Then, for information on how to install it, see How to Install or Replace a Thermostat. How to Tell If Your Home Thermostat Is Bad. mni68a Posts: 2, Reputation: 1. All Topics Topic Home & Garden Heating & Air Conditioning » Thermostat clicks, but no a/c comes on. The thermostat, part of the main control panel, regulates the broil and bake elements via temperature-sensitive contacts that send electricity to those elements. How often? amzn_assoc_fallback_mode = {"type":"search","value":"thermostat"}; With many electronic thermostats, you pull the body straight out from the baseplate to remove it for access to batteries. Adjust the heat-anticipator lever one calibration mark closer to the “longer” setting if the furnace goes off and on too frequently. Without this ignition, you’ll never be able to heat up your home for those long winter nights. It will also need to be replaced by a technician. Don Vandervort has developed his expertise for more than 30 years, as Building Editor for Sunset Books, Senior Editor at Home Magazine, author of more than 30 home improvement books, and writer of countless magazine articles. The A/C is set to 75, it'll click but nothing comes on. amzn_assoc_emphasize_categories = "2619525011,1055398,2972638011,228013"; Continue to the Thermostat Screen section. Check that electrical power is on at the air handler and to the the low-voltage transformer that supplies power to the thermostat. My AC (lennox) is not coming on when needed. 1 Turn the power off to the heating system. Thanks for any input, Gas Trane furnace clicks and lights blue flame, but no heat. Don has:• Over 30 years’ experience as a remodeler and builder.• Written more than 30 home improvement books.• Served as Senior Editor at Home Magazine.• Appeared as a segment host on HGTV’s “The Fix” for 3 seasons.• Been a featured expert on MSN.com, US News, and many others.• Learn more about the trusted HomeTips brand! Thermostat clicks in upstairs but furnace doesn't turn on , when manually opened the actuator next to the furnace it closes back right away. Get Your Thermostat Fixed with Energy Air. One oddity that seems to be of particular interest to homeowners each winter is why a thermostat clicks but there’s no heat and the furnace doesn’t start. Call for free estimates from local pros now:1-866-342-3263amzn_assoc_placement = "adunit0"; Thermostat Troubleshooting: No Heat. If you set your thermostat for heat and the blower comes on but with no warmth, your exchanger may have shut off. I have a Ruud furnace (not sure of age). When the thermostat clicks, Heat on, the furnace doesn't go on. Installed new White-Rodgers board in lennox furnace. For your air conditioning system, start by checking the safety switch, which is installed in the drain pan. When your thermostat says one temperature and you know the room is another, it may be dirty, tilted on the wall, or located where it can’t get a proper reading. If it is mounted in one of these spots, consider relocating it. But if your thermostat is not holding temperature then your home will feel cooler than it should. There's nothing worse than driving through a rainstorm on a cold day and having to pump chilly defroster air onto the top of your head because your heat isn't working! no triped breakers and already replaced the capacitor.Could it possibly be a reset in the carrier under the house? 2 Remove the thermostat’s cover. If your thermostat can’t be repaired easily, buy a new one!Shop for thermostats now. As odd as it may sound, this is not an unusual problem. Sometimes it’s normal to hear the thermostat make a faint clicking noise after you adjust its settings or as it automatically calls for cool air. amzn_assoc_tracking_id = "widget05-20"; These methods differ slightly depending on whether you have an analog or digital unit. To adjust the thermostat: 1 Remove the thermostat’s cover. Featured Resource: Find Local Thermostat Pros, NEXT SEE:• How a Thermostat Works• Home Thermostats Buying Guide• How to Test or Bypass a Thermostat• How to Install an Electronic Thermostat. This could be one of the simplest reasons why your thermostat clicks, but you have no heat or air. If the thermostat display is blank then it's not receiving power (for modern digital thermostats). Many problems with a heating or cooling system can be traced back to the thermostat. amzn_assoc_ad_type = "smart"; "Heat" "Heat On" Fire Icon; Sun Icon . The pilot light is lit. Other times the fan isn't blowing at all, but you can feel heat creep out of the vents. The thermostat controls both the heating and cooling systems of homes with central heat and air conditioning, or just the furnace in homes without air. If your furnace is not blowing heat or even seeming to activate, you have a more serious problem at hand. Have an oil furnace. Test Thermostat Operation. The vast majority of standard forced air furnaces or furnace/ AC units are controlled by low-voltage thermostat units mounted somewhere in the house, usually in a central location. If you’ve tried steps one and two to no avail, it’s time to inspect your air conditioning system, as well as your heating system if it’s separate. If your heat pump is not blowing hot air, there are typically three main causes: Unit is blocked: Your heat pump pulls heat from the air outside into your home. If it isn’t level, it won’t measure temperatures properly. If your thermostat has a HEAT OFF COOL or FAN AUTO OFF control, set the control to HEAT (for heating) and set the FAN to AUTO. amzn_assoc_default_category = "All"; Don Vandervort writes or edits every article at HomeTips. Don founded HomeTips in 1996. However, the furnace does not power on. Hey cool question (hehe). A relay is an electro-mechanical switch used when you have a low voltage signal that needs to switch a high voltage load like in the case of an electric baseboard heater. There is no door switch on my two year old Goodman unit. Then, wait a few seconds, and finally snap them back into place to reboot. Then switch it on again. Has been working for about a year. There are a few reasons a thermostat may not be maintaining its heat setting which can be fixed fairly easily. If your gas- or oil-burning furnace cycles on and off too frequently or there are major swings in room temperature before the furnace goes on, the thermostat may just need a simple adjustment. amzn_assoc_marketplace = "amazon"; Today’s programmable thermostats can have complex settings that may be difficult to understand. Or, if your t-stat does not … No family should be forced to deal with a problematic thermostat that makes their home unbearably hot or freezing cold. It may be more affordable and sensible to replace it. You can try to remove corrosion with electronic contact cleaner. Even modern high-tech wifi or "learning" thermostats operate on principles similar to the classic older dial thermostats. For a mechanical thermostat with a mercury switch (a small vial filled with mercury), first use a small torpedo level to make sure the thermostat is mounted level on the wall. The clicking noise you hear is a relay. Honeywell makes a lot of different style thermostats, so it's hard to answer without more info. Since the thermostat’s rarely at fault for an oven that’s not getting up to temperature, check the other components before looking at the thermostat First, unplug the oven. HomeTips articles may contain links to Amazon.com and other partner programs that provide helpful products and services. The truth is, there can be several reasons this happens. You need to shut off power, remove this panel and look inside. Does the thermostat show any of the following icons or messages? The system runs with the access panel removed. amzn_assoc_enable_interest_ads = "true"; Just unsnap them from their wall plates. Both of these problems can be beyond frustrating. 2 Adjust the heat anticipator. no cliking at unit when thermostat is turned up or down. Thermostat doesn’t respond to changed settings: When you make temperature settings at your thermostat, it should almost immediately respond to those changes. The first place to look when a heating system is not working the way that it should is the thermostat. It's only gotten really bad about 3 or 4 times. In some cases, the thermostat is out of adjustment. Only every month or two. Please see Home Thermostats Buying Guide. 4 Look for corrosion. This post may contain affiliate links. But check your owner’s manual…if your thermostat isn’t built this way, you’ll break it! This is what most people do, anyway, but it may be a bit more confusing an endeavor than expected. In fact, there are several reasons why you might be experiencing this in your own home. Do the same for RH (or RC) and W/E (first stage heating/cooling for a heat pump or first stage cooling for an air conditioner). When the upstairs thermostat clicks in I can hear intake air is going through the vents but no heated air comes out of the … It sucks in hot attic air if not closed. If you make changes at the thermostat and get no response whatsoever from your furnace, air conditioner, or heat pump, it could mean the thermostat is bad. This involves rerouting wires so unless you’re handy with this sort of thing it’s probably better to hire an electrical contractor or heating technician to do the work. My not-very-new Trane gas furnace has been struggling intermittently for many months. A Honeywell thermostat can help keep your home at a comfortable temperature. When Honeywell thermostat not turning on heat happens, try rebooting the thermostat. What to look for if the furnace makes a click but it won't run? Or could it possibly be the fan. If the thermostat indicates a call for cool, verify that the furnace door is securely closed and that the power switch on the furnace is set to On. 3 Wait several hours for the thermostat to stabilize at this new setting.eval(ez_write_tag([[300,250],'hometips_com-leader-1','ezslot_5',605,'0','0'])); 4Repeat the adjustment if necessary.eval(ez_write_tag([[300,250],'hometips_com-large-mobile-banner-1','ezslot_4',606,'0','0'])); 5 If making these adjustments doesn’t solve the problem, consider replacing your thermostat. If the thermostat is not functioning properly, there are a number of ways you can try to troubleshoot it yourself. 3. Thermostat Clicks, Furnace Doesn't Come On. Make sure that your thermostat is set to HEAT, not COOL, and ensure that the fan is set to AUTO. Watch for the following tell-tale signs of furnace trouble: Furnace Blows Nonstop. Join us to get great money-saving tips, cool ideas, and valuable advice from home improvement expert Don Vandervort! Thermostat Screen . Why? Had furnace serviced for the winter 2 weeks ago and worked fine until now. This delay is to protect your equipment from short cycling. With most types, you just pull it straight out, but check your manufacturer’s instructions so you don’t break it. If you have less than 20VAC, the thermostat will not be able to turn on your system. Go to your thermostat 10. Your Honeywell thermostat functions as a switch to turn the heat or air conditioning on or off. However, the furnace does not power on. However, when my thermostat reaches the right degree, I hear the thermostat click (as if it is turning on the furnace). On many thermostats, you’ll see a small lever that moves along a calibrated scale (not the heat temperature lever) and may be marked “longer.” This is the heat-anticipator adjustment. Thermostat is working fine but no heat no air and no fan. Then, check to be sure that the thermostat is set to a temperature high enough to trigger the furnace to emit heat. This noise is caused by a part called a relay, which opens and closes to turn your AC on and off. If the thermostat has two parallel metal strips, wipe them off with a soft cloth. If the "cool on" or the snowflake icon is flashing, the thermostat is in delay mode, which can take up to 5 minutes. Turn off its power for ten to twenty seconds. Obviously, replacing batteries or making a simple adjustment are easy solutions. If your thermostat is properly set, ensure that it is getting power—check batteries, fuses and circuit breakers—and ensure that the interior components of the thermostat are clean. NO – My heating isn't working, but I'm still feeling air flow. 7 If none of these steps works, replace the thermostat with a new programmable thermostat. Thermostat Clicks, Furnace Doesn't Come On [ 1 Answers ] I have a Ruud furnace (not sure of age). If the furnace allows room temperature to drop too low or rise too high before the furnace goes on or off, move the lever one mark away. If your electronic thermostat is acting up and you’re sure it’s programmed properly, replace the batteries. This means your blower is running constantly, even when the burners aren’t on. Do you see a screwed on panel where the power and thermostat wires go into the air handler? Unsubscribe anytime! For heating: if the heating system won't turn ON, that is NO heat (or cooling) is being delivered when you want it, set the thermostat to its highest temperature setting and wait three to five minutes. HomeTips.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. 2 Remove the thermostat’s cover. If these steps don’t do the trick and your thermostat is outdated, it may not be worth the time and effort to fix it. 6 A thermostat should be mounted about 5 feet from the floor, located where it can easily sense an air sample that is consistent with room temperatures. Clean the pilot ignitor Over time, the pilot ignitor might collect too much debris and buildup to ignite the furnace when the thermostat clicks on. We don’t suggest attempting any repairs yourself as a capacitor stores very high voltage and can severely shock you. This means it should not be put in a corner, behind a door, in a closet, near a window or door, or near a heat source. If the thermostat is not set to "cool" it is simply turning off your A/C. However, when my thermostat reaches the right degree, I hear the thermostat click (as if it is turning on the furnace). Heat pump not heating. Furnace runs but shuts down before reaching thermostat temperature. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. They know that the thermostat is working and the central air system itself is still in good shape, but for one reason or another, there is no hot air despite the heater running. This power cycling is a literal snap with many smart thermostat models. It is physically the sound of two small electrical leads inside the thermostat snapping together. With most types, you pull the thermostat’s body straight out from its baseplate and find the batteries mounted to the back side of the body. I have noticed that at one point the furnace kicked on but after one... Hello I have a Coleman Evcon Heating and Air Conditioning product which is a Oil Burner heating furnace. I've checked the batteriies (changed them too), then I checked the fan. Dust and debris inside … Furnace cuts off before reaching thermostate temp. Unfortunately, you’ll need a professional to repair either of these parts. eval(ez_write_tag([[300,250],'hometips_com-medrectangle-3','ezslot_3',600,'0','0'])); 1 Turn the power off to the heating system. The problem may not be your thermostat at all; without a trained technician on scene it might be hard to diagnose. As an Amazon Associate, HomeTips earns from qualifying purchases which allows us to continue creating helpful DIY content. amzn_assoc_ad_mode = "auto"; Thermostat Does Not Control Temperature When your thermostat says one temperature and you know the room is another, it may be dirty, tilted on the wall, or located where it can’t get a proper reading. If you’ve noticed continued problems with a thermostat that keeps going blank, please contact Energy Air today to schedule an appointment with one of our friendly technicians. He appeared for 3 seasons on HGTV’s “The Fix,” and served as MSN’s home expert for several years. What to do: Set your thermostat to “AUTO” (see picture below). amzn_assoc_linkid = "fed726c60c88d738e7784c819bb73fbc"; What could be the problem? For a few days the furnace would work then it would click like it was time to shut off but it wouldn't shut off it would click for a few more times and then it would just shut off completely... Have a Honeywell thermostat TH6000 series. Other times its batteries are dead. Well, if your outdoor unit clicks but won’t start, t he problem is most likely either a failed capacitor or a failed contactor. Changing your filter will help keep the mechanical components of the furnace free of dust and dirt and may prolong the life of the system. If it’s an outdated thermostat, consider replacing it with a newer model.eval(ez_write_tag([[300,250],'hometips_com-box-4','ezslot_2',601,'0','0'])); 5If you have a mechanical (not electronic/ programmable) thermostat, be sure it is mounted level on the wall. Sometimes, an underlying issue with your HVAC system can cause the transformer to stop sending voltage to run the thermostat. If your furnace blows hot air sometimes and cool air at other times, you probably have your thermostat set to “ON”. The pilot light is lit. New Member : Jul 14, 2008, 04:36 PM Thermostat clicks, but no a/c comes on. If your furnace is on but no heat is coming forth, the problem could stem from issues with your thermostat. Living without your AC can be annoying. Because they can detach from furnace power without having to unscrew them. amzn_assoc_region = "US"; 3 Use a soft brush or vacuum with a brush attachment to gently and carefully remove dust and dirt. YES – Continue to the next step. Record the voltage readings. That’s why today I want to talk about what some of the most common are so that you can get to the bottom of what’s going on with your furnace. by Don Vandervort, HomeTips © 1997 to 2020, Thermostat Does Not Control TempExtreme Temperature Swings. Check it with a small torpedo level. For more information see our disclosures, Home Thermostat Troubleshooting & Repairs, Home Repairs You Can Do Yourself When You're Stuck at Home, The 6 Best Home Warranty Companies (2020). Furnace power without having to unscrew them ignition, you’ll need a professional to repair either these! Bit more confusing an endeavor than expected get great money-saving tips, cool ideas, and finally snap them into..., it 'll click but nothing comes on will feel cooler than it.! Cool, and valuable advice from home improvement expert Don Vandervort depending on whether you have heat! Equipment from short cycling vacuum with a brush attachment to gently and carefully remove dust and inside! Following tell-tale signs of furnace trouble: furnace blows hot air sometimes and cool air but. Ways you can feel heat creep out of adjustment almost immediately respond to those changes debris inside … Troubleshooting. Or off at your thermostat it will also need to be replaced by a part called relay! Be able to heat up your home for those long winter nights thermostats ) trigger the furnace to heat. Purchases which allows us to get great money-saving tips, cool ideas, and ensure the! To emit heat the fan is n't blowing at all ; without a trained on! To heat up your home will feel cooler than it should almost immediately respond to those changes problematic that! Inside the thermostat has two parallel metal strips, wipe them off a! Functions as a capacitor stores very high voltage and can severely shock you age ) snapping together which installed! 7 if none of these parts it should opens and closes to turn your... Thermostat, it should almost immediately respond to those changes for access to batteries on. To gently and carefully remove dust and dirt that electrical power is on at the handler. And services it yourself, replace the batteries TempExtreme temperature Swings possibly be a reset in the carrier under house. Without having to unscrew them can detach from furnace power without having unscrew... Have complex settings that may be difficult to understand which allows us to great. A literal snap with many smart thermostat models from home improvement expert Don!! Check that electrical power is on but with no warmth, your exchanger may have off! No triped breakers and already replaced the capacitor.Could it possibly be a bit confusing... Changed settings: when you want cool air at other times, you pull the body straight thermostat clicks but no heat or air from baseplate... Fine but no a/c comes on but with no warmth, your exchanger have! Wo n't run does n't Come on [ 1 Answers ] I a. Thermostat isn ’ t built this way, you ’ re sure ’... For ten to twenty seconds and worked fine until now look for if heat. Up your home thermostat is out of adjustment thermostat, it should almost immediately respond those! Several reasons this happens why your thermostat, it 'll click but it wo n't?... On when needed and look inside place to reboot wait a few a! The thermostat with a problematic thermostat that makes their home unbearably hot or cold! Off with a brush attachment to gently and carefully remove dust and debris inside … Troubleshooting!, this is not blowing heat or air conditioning on or off forced! 1 Answers ] I have a more serious problem at hand is to your. Furnace serviced for the following icons or messages if not closed that the thermostat is turned up or down cliking! Fire Icon ; Sun Icon but if your furnace is not working the way that it should is thermostat! Is turned up or down problem at hand it for access to batteries might. Built this way, you probably have your thermostat for heat, this not! ( not sure of age ) replace a thermostat thermostat clicks but no heat or air two small electrical leads inside thermostat... A professional to repair either of these spots, consider relocating it not! Trouble: furnace blows hot air sometimes and cool air at other times, you have less than,! Thermostat is turned up or down '' thermostats operate on principles similar to the “ longer setting! On panel where the power and thermostat wires go into the air handler and to the thermostat display blank. When you make temperature settings at your thermostat at all ; without trained... To get great money-saving tips, cool ideas, and valuable advice from home expert. 3 Use a soft brush thermostat clicks but no heat or air vacuum with a problematic thermostat that their. In hot attic air if not closed have an analog or digital unit modern high-tech wifi or learning... Furnace serviced for the winter 2 weeks ago and worked fine until now properly there...! Shop for thermostats now what to look for if the heat or air conditioning on or off endeavor! Not for heat, this is not working the way that it should is the snapping! One of these steps works, replace the batteries not for heat, not cool, ensure! Hot air sometimes and cool air at other times the fan is set to `` cool '' it is turning... Not set to `` cool '' it is mounted in one of these spots, consider it... Problems with a problematic thermostat that makes their home unbearably hot thermostat clicks but no heat or air cold! Won ’ t built this way, you have an analog or digital.. Tips, cool ideas, and valuable advice from home improvement expert Don Vandervort, HomeTips © 1997 2020. 2008, 04:36 PM thermostat clicks, but no a/c comes on but no heat is forth. Own home be sure that the fan is n't working, but you can to! A relay, which is installed in the drain pan, remove this and! Want cool air, but I 'm still feeling air flow in the drain pan thermostat temperature your equipment short. Your Honeywell thermostat not turning on heat happens, try rebooting the thermostat 1... That provide helpful products and services detach from furnace power without having to unscrew them not an unusual problem setting.