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HomeRepair HelpKenmore Central A/C RepairKenmore Central air conditioner wall thermostat not working properly Repair
Kenmore Central air conditioner wall thermostat not working properly
Is your Kenmore central air conditioner wall thermostat not working? The thermostat itself is the most likely problem, followed by a Kenmore wall thermostat if your system uses one. An ac thermostat not working may have a dead display, fail to communicate with the air conditioner, or stop turning on the AC even when the home is warm. First, check for replaceable wall thermostat batteries, since depleted batteries are a common cause of a blank thermostat. If the thermostat has power but will not send the correct 24-volt signals, replace the wall thermostat. A failed control board in the furnace or air handler can also prevent power from reaching the thermostat. Less common causes include a tripped circuit breaker, blown fuse, switched-off furnace or air handler, or damaged thermostat wire. You can inspect batteries, settings, visible wiring, and the equipment power switch, but turn off power before handling wiring. Testing 24-volt circuits requires care, and any 120/240-volt work inside the air handler, furnace, or disconnect box should be handled by a qualified technician. Enter your Kenmore model number to find the exact replacement thermostat, control board, fuse, or wiring for your central air conditioner.
01 - Kenmore 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 - Kenmore 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 - Kenmore 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 Kenmore central air conditioner thermostat not working?
Why is my thermostat not turning on the AC even though the display works?
How can I test a wall thermostat that is not working?
Could a bad control board or transformer cause a blank thermostat?
How do I find the correct Kenmore thermostat replacement part?
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