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HomeRepair HelpBroan Central A/C RepairBroan Central air conditioner wall thermostat not working properly Repair
Broan Central air conditioner wall thermostat not working properly
If your Broan wall thermostat is not working, the thermostat itself is the most likely problem, especially if the display is dead or it does not send the correct signals to the central air conditioner. A Broan wall thermostat can show the same symptoms and may need replacement if it has 24-volt power but will not control the system. Before replacing either thermostat, check the thermostat batteries, since weak or dead batteries are a common cause of a blank display. If the batteries are good, a failed Broan control board may not be supplying 24 volts to the thermostat. Less commonly, an incoming power problem, such as a tripped circuit breaker, blown fuse, or switched-off furnace or air handler, can leave the AC thermostat not working. Damaged thermostat wire can also prevent the thermostat from communicating with the indoor or outdoor unit. Turn off power before inspecting wiring, and leave line-voltage testing or repairs to a qualified technician. Enter your Broan central air conditioner model number to find the exact replacement thermostat, wall thermostat, control board, or other part for your system.
01 - Broan Central Air Conditioner Wall Thermostat
The wall thermostat is responsible for controlling components and regulating the home's temperature. The thermostat can be powered with 24 volts from a control board on a separate unit like a furnace or air handler, or from batteries in the thermostat itself. The thermostat also has terminals to receive and distribute low voltage 24 volt power to run different HVAC products such as a furnace, air conditioner, or heat pump. If the wall thermostat is receiving power but the display is dead, or it will not send power out in the appropriate modes, the wall thermostat will need to be replaced.
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Highly Likely
02 - Broan Central Air Conditioner Wifi Thermostat
The WiFi thermostat is responsible for controlling components and regulating the home's temperature. The thermostat is usually powered with 24 volts from a control board on a separate unit like a furnace or air handler. The thermostat also has terminals to receive and distribute low voltage 24 volt power to run different HVAC products such as a furnace, air conditioner, or heat pump. If the WiFi thermostat is receiving power but the display is dead, or it will not send power out in the appropriate modes, the WiFi thermostat will need to be replaced.
Highly Likely
03 - Wall Thermostat Batteries
Most wall thermostats are either powered by an enclosed battery or by the furnace or air handler control board. If the thermostat display is dead, you can remove the thermostat cover and look for replaceable batteries. Replace the batteries if needed and check operation.
Common
04 - Broan Central Air Conditioner Control Board
The control board regulates the power supply to all of the components in the system. If the control board fails, it might not send voltage to the thermostat, leaving the thermostat inoperable.
Less Common
05 - Incoming Power Problem
Check to see if there is power to the furnace or air handler. One or more indicator lights on the control board should be illuminated. If there is no power to the furnace or air handler, check to see if a circuit breaker has tripped or a fuse has blown. Confirm the power switch on the side of the unit is turned on.
Less Common
06 - Bad Wall Thermostat Wiring
In order to send signals from and to the indoor and/or outdoor units, the wall thermostat uses a group of wires usually called thermostat wiring. If the thermostat wiring gets damaged, certain functions of the system or the thermostat itself may not function properly. The thermostat wiring can be checked for power or continuity with a multimeter. The wiring is usually industry standard colors: Red/White/Yellow/Green for a four-wire system.
Less Common
Frequently Asked Questions
Why is my Broan central air conditioner thermostat not working?
What should I check if my thermostat is not turning on the AC?
How do I test a wall thermostat that is not working?
Could a bad control board or transformer cause thermostat problems?
How do I find the correct Broan thermostat replacement part?
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