Why does my AC fan keep running?
AC Unit Is Too Small Or Unable To Match Settings A too-small HVAC system will often run to keep up with the thermostat setting, leading the fan and blower to run consistently. Additionally, if your area is facing extreme temperatures, your HVAC unit may not reach the desired temperature.
Why does my air handler keeps running?
When your system’s air filter is full of dirt and debris, the flow of air is restricted, which can impede the functioning of your air conditioner. Without enough air flowing over the coils, the system can’t remove humidity and cool the air to the set temperature, so it keeps running when it shouldn’t.
Why does my air conditioner keep running when the fan is turned off?
A damaged thermostat may also be the issue. If you notice your air conditioning and the blower fan all of a sudden start running, then the problem is more than likely the thermostat. This is fairly inexpensive to fix and installing a new one isn’t that difficult either. A short circuit or a damaged relay will definitely cause you to have problems.
When does a HVAC fan need to be running?
In many systems, the blower fan runs a minute or so before heating or cooling begins and ends to get air flowing. The only other time your blower fan should be running on its own is if you’ve flipped the thermostat switch to “on” to temporarily run your blower fan for increased air circulation. Common fan issues.
Can a faulty thermostat cause a fan to run?
Faulty Thermostat: If both the fan and either the cooling or heating system are running unexpectedly, you may have a faulty thermostat. Broken Relay Switch or Short Circuit: If only the fan is running, there may be a broken relay switch preventing the settings you enter on the thermostat from being sent to the fan.
What are the pros and cons of running an AC fan?
There are a few positives to this feature. Keeping the fan on creates an evener distribution of heating and cooling, circulating the air if you have cold or hot spots in your house, like a bedroom above a garage. Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend its lifespan.