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What to Do When Your Thermostat Flashes a Red Light

Helms Heating & Air Conditioning - Monday, February 06, 2017
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Unless you know there’s a problem with your heating and air conditioning system, you don’t pay much attention to it. If it starts making strange sounds or isn’t operating properly, that’s when you notice. One common issue that you would definitely notice is a red light on your thermostat. Here’s what you need to know:

What Is the Red Light Trying to Tell You?

If you see a red light on your thermostat, don’t panic. This light is referred to as the Emergency Heat Light, but it can show up during normal operation of your heat pump. If the light is solid or flashing, it means there is a problem with the outdoor unit. The unit will shut itself off and send a signal to the thermostat indicating a problem, which will kick the light on so you can be aware of the problem and have it addressed.

What Is the Problem?

As a diagnostic tool, the red light can indicate some different potential issues within your HVAC system. These can include a high or low discharge temperature, going into defrost mode too frequently, a bad liquid line sensor, a broken or malfunctioning ambient sensor, or it could indicate that the high or low-pressure sensor is on.

What Do I Do Now?

The best course of action is to call in an HVAC tech to check your HVAC system and diagnose the problem. They can analyze the system and determine what caused the Emergency Heat Light to turn on.

Before you panic, wondering why your thermostat is suddenly flashing a red light, take a minute and call in a professional. For a flashing red light, or any issues with your heating and air conditioning system, schedule a service with our friendly team at Helms Heating and Air Conditioning today.