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HomeRepair HelpBryant Central A/C RepairBryant Central air conditioner won't turn on Repair
Bryant Central air conditioner won't turn on
If your Bryant central air conditioner won't turn on, start with the transformer, the most likely cause when the furnace control board is not sending the required 24-volt signal to the contactor. A failed control board can also prevent the condensing unit or furnace blower motor from receiving the proper signal. If the thermostat display is blank, replace its batteries, then check for an incoming power problem, such as a tripped circuit breaker, blown fuse, or turned-off furnace or air handler power switch. A defective wall thermostat or thermostat wiring is less common but can stop the cooling signal from reaching the contactor through the thermostat wire. This troubleshooting applies when the Bryant air conditioner is not turning on at all, including when the AC has no power or the outside unit will not start. You can safely check thermostat batteries and visible power switches, but testing 24 volts and working inside the furnace, air handler, disconnect box, or condensing unit requires electrical knowledge. Turn off power before servicing, and have a licensed HVAC technician handle 240-volt line-voltage repairs. Enter your model number to find the exact Bryant replacement transformer, control board, thermostat, or other part for your central air conditioner.
01 - Bryant Central Air Conditioner Transformer
The furnace control board sends a low voltage signal of 24 volts to the thermostat. When the themostat cooling contacts close, a 24 volt signal is sent to the contactor coil, closing the high voltage circuit and sending power to the condensing unit components. Some furnaces have a separate transformer for the 24 volt circuit, so if the contactor is not receiving the proper voltage when the thermostat cooling contacts are closed, it's likely this transformer has failed and the component will need to be replaced.
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Highly Likely
02 - Bryant Central Air Conditioner Control Board
If the central air condensing unit contactor is not receiving 24 volts or power is not getting to the furnace blower motor, a possible cause is a defective furnace control board. While this is not a common problem, if all other potentially faulty components are working properly, the control board should 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 transformer. 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 - 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.
Common
05 - Bryant Central Air Conditioner Wall Thermostat
The furnace control board sends a low voltage signal of 24 volts to the contactor through the wall thermostat. When the contactor receives the signal from the wall thermostat, it closes the circuit, sending voltage to the condensing unit components. There should be 24 volts between the common (“C”) and yellow (“Y”) thermostat wire terminals on the furnace control board when the wall thermostat is in the cooling mode. You can check for this voltage with a multimeter. If voltage is not reaching the contactor, it's likely the wall thermostat is defective and will need to be replaced.
Less Common
06 - Bryant Central Air Conditioner Wifi Thermostat
The furnace control board sends a low voltage signal of 24 volts to the contactor through the WiFi thermostat. When the contactor receives the signal from the WiFi thermostat, it closes the circuit, sending voltage to the condensing unit components. There should be 24 volts between the common (“C”) and yellow (“Y”) thermostat wire terminals on the furnace control board when the WiFi thermostat is in the cooling mode. You can check for this voltage with a multimeter. If voltage is not reaching the contactor, it's likely the WiFi thermostat is defective and will need to be replaced.
Less Common
Frequently Asked Questions
Why won't my Bryant central air conditioner turn on?
How can I tell if my Bryant AC thermostat is not working?
Could a bad transformer keep my Bryant central air conditioner from turning on?
How do I know whether the Bryant AC control board is bad?
How do I find the correct Bryant central air conditioner replacement part?
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