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HomeRepair HelpKelvinator Central A/C RepairKelvinator Central air conditioner wall thermostat not working properly Repair
Kelvinator Central air conditioner wall thermostat not working properly
Is your Kelvinator central air conditioner thermostat not working? Start with the wall thermostat, the most likely cause. A failed thermostat may have a blank display even when it receives 24 volts, or it may not send the correct signal to start cooling, making the AC thermostat not turn on the air conditioner. A failed wall thermostat can cause the same central air thermostat problem. If the thermostat is blank, replace its batteries if it uses them, since dead batteries are a common and simple fix. If batteries are good, the furnace or air handler control board may not be supplying 24 volts, or the control board itself may have failed. Less commonly, incoming power may be interrupted by a tripped circuit breaker, blown fuse, or the unit's power switch being off. Damaged thermostat wire can also prevent the thermostat from communicating with the indoor or outdoor unit. Battery replacement and visual checks are DIY-friendly, but testing 24-volt circuits or accessing line-voltage wiring in the furnace or air handler requires care; have a qualified technician handle line-voltage repairs. Enter your model number to find the exact Kelvinator thermostat, wall thermostat, control board, transformer, fuse, or wiring replacement part for your system.
01 - Kelvinator 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 - Kelvinator 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 - Kelvinator 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 Kelvinator thermostat not working or turning on the AC?
What should I check if my central air thermostat is blank?
How can I test bad thermostat wiring when my AC thermostat is not working?
Could the control board or incoming power be causing my thermostat not to turn on the AC?
How do I find the correct Kelvinator thermostat replacement part?
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