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HomeRepair HelpGoodman Central A/C RepairGoodman Central air conditioner wall thermostat not working properly Repair
Goodman Central air conditioner wall thermostat not working properly
If your Goodman central air conditioner thermostat is not working, the wall thermostat is the most likely cause. A failed thermostat can leave the display blank, prevent the air conditioner from turning on, or keep it from communicating with the furnace or air handler. A Goodman wall thermostat can show the same symptoms, including an ac thermostat not working or a thermostat not turning on the AC. If the display is blank, check and replace the wall thermostat batteries first, since battery failure is common. If that does not restore operation, the control board may not be supplying 24-volt power to the thermostat. Also check for an incoming power problem, such as a tripped circuit breaker, blown fuse, or turned-off furnace or air-handler power switch. Damaged or loose thermostat wire can prevent heating and cooling signals from reaching the indoor or outdoor unit, but testing wiring for power or continuity requires care. Turn off system power before replacing a thermostat or handling low-voltage wiring. Do not work on energized 120/240-volt wiring, the disconnect box, or circuit breaker; hire a qualified HVAC technician for that work. Enter your model number to find the exact replacement thermostat, wall thermostat, batteries, control board, or wiring for your Goodman central air conditioner.
01 - Goodman 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 - Goodman 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 - Goodman 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 Goodman central air conditioner thermostat not working?
What should I check when my AC thermostat is not turning on the air conditioner?
Can a bad thermostat battery or thermostat wire cause my central AC not to turn on?
How do I know whether the Goodman thermostat or control board is bad?
How can I find the correct Goodman thermostat replacement part?
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