Why is thermostat not working

If the thermostat batteries are worn out, they will need to be replaced with a fresh set. This simple step alone resolves many thermostat issues. Some thermostats open easily so that you can clean the inside. Others will require that you unscrew the faceplate. To clean your thermostat, brush the inside gently with a dry, clean paintbrush or similar soft tool.

Compressed air also works if you follow all safety instructions on the can. If your older electromechanical thermostat usually controlled by a dial is not working, there are extra steps you might take to find out why. Try lightly pushing it in either direction to see if that solves things. This may not sound easy, but it only takes a few minutes. If your thermostat is irreparably broken, or you just want to upgrade to a smart thermostat with updated technology, it is time to get a new one.

When thermostat problems develop, they are rarely dramatic events with sparks flying, or where smoke alarms sound. Most thermostat malfunctions cause subtle or sudden changes in the performance of your cooling system. A faulty thermostat may be to blame if the air conditioner short cycles and runs almost nonstop, the living space seems warmer than your desired temperature setting, or you suddenly experience a cooling system failure.

Learning how to troubleshoot these issues can help you avoid an unnecessary and costly service call. If it is not, the thermostat cannot signal the air conditioner to cycle on. First, check for a buildup of dirt, soot, cigarette smoke or dust.

A buildup of grime can cause inconsistencies between the temperature setting and the actual room temperature, so follow the above cleaning instructions before taking any additional steps.

A poor installation job or good bump can leave a usually level thermostat off kilter. This can also cause temperature discrepancies. A stuck heat anticipator is another possible culprit if the thermostat is a mechanical model.

The thermostat may register a reading that is far lower than the rest of the property. A thermostat unit can also experience problems when it needs a good cleaning. Over time, dust, dirt, and lint particles can find their way inside your unit, possibly blocking sensors or causing other issues. That can also result in an incorrect temperature reading. One way to fix this involves removing the thermostat cover and cleaning inside the equipment. To do this effectively, use a soft tip brush or cloth to wipe away dirt and other particles.

Be very careful when doing this as there are delicate wires that could easily get damaged. Here are the common causes of this issue:. Once again, your thermostat could use some cleaning. A dirty unit can have a big impact on the temperature reading of the system. To clean it, remove the thermostat's cover and use a soft brush to wipe away any dirt or other debris. If corrosion has taken place in your unit, the electrical components may not be working properly.

To fix the problem, try using an electronic contact cleaner. However, if you have an older thermostat, you may be better off replacing it. A thermostat should never be installed next to a fireplace, in a cold area, or too close to the floor.

On some occasions, a thermostat may not allow you to change the temperature. This is an annoying issue to deal with. Here are some reasons why this may be happening:. The majority of digital thermostats have a lock feature.

Homeowners use this to prevent others from making adjustments to the temperature. If your unit isn't changing the indoor temp at all, this lock setting could be enabled. Turning this feature off could solve the problem. The unit will work based on the settings and programming you provided. Is your thermostat not working at all? Subscribe to the Blog.

Get a No-Cost Estimate. Yes No. When your heating or cooling goes out, the problem could be your thermostat, rather than your furnace or air conditioner.