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What is Wrong with My Thermostat?

by vscontent on March 17, 2016

What is Wrong With My Thermostat-

If you are having issues with your heating or cooling unit, there might be a problem with your thermostat.

Whether it’s an electronic, mechanical or programmable design, a thermostat is a temperature sensitive device that controls your HVAC operation. Before you call an HVAC professional to check out your system, try these thermostat trouble-shooting tips.

Heating and Cooling Issues

Modern thermostats make running your heating and cooling systems both easy and more efficient. But the complexity of their design can also make it easy to accidentally change a mode or setting. If your unit is not heating/cooling properly:

  • Check to make sure that the thermostat is in the proper mode.
  • Check to make sure that the fan is turned off.
  • Are the settings correct? If so, try a heating/cooling test by setting the temperature a few degrees above or below the current reading.
  • Dust might be a culprit with certain thermostat designs. If you own an older model, consult the manual and lightly dust the interior and exterior with a brush.
  • Check the batteries or the circuit breaker to rule out a power issue. (Sometimes the problem is as simple as changing the batteries.)
  • Inspect the wiring on the back of the thermostat to make sure it isn’t a connection issue.
  • If your thermostat is 15 years or older, it could simply be aging wiring and would need to be replaced.

Rapid Cycling

If your HVAC is cycling (turning on and off) too frequently, then it could be a problem with your thermostat. It could also be related to dirty components in your HVAC. If your unit is cycling too frequently:

  • Your thermostat could be affected by its surroundings and “ghost reading” a nearby temperature. Any heat-producing appliance like a ceiling fan or a hot area like a door or window could be causing the problem. Make sure that the thermostat is located in a central area, away from major appliances and front and back entryways. Thermostats should also be mounted about five feet from the floor where it can get a proper air sample.
  • Rapid cycling could also mean that there is a problem with the heating or cooling unit itself. Always check the filter to make sure that it isn’t dirty. During a heavy usage period, generally summer and winter, a filter should be changed at least once a month. A dirty filter or heat exchanger can obstruct the airflow of the HVAC, causing it to overheat and shut itself down. When the system cools, it will turn on once again only to shut down and repeat the cycle.

Clicking Sounds  

A prominent clicking noise coming from your forced air unit could be a faulty relay. If so, this would prevent the HVAC from receiving a signal from the thermostat. This problem should be handled by a professional HVAC technician.

If you have tried all of these tips and your HVAC is still not working properly, then you will want to consult an HVAC professional to come and assess your unit. Remember that Pacific Air can help you with all of your heating and cooling needs.

Call us today at 253-292-3995 and we’ll get your forced air system working again!

Read About How to Choose a Programmable Thermostat