What should the air conditioner fan pressure be?
What should the air conditioner fan pressure be?
For example, at a coolant temperature of 51.0°C (123.8°F) the refrigerant pressure should be no more than 12 bar. If it is higher, the air-conditioning control module presumes that the pressure is high and assigns the fan control module to run at 90% PWM actuation.
Why is my air conditioner fan running at high speed?
This problem is often caused by a faulty pressure sensor located on the air-conditioning condenser. If accessing fault codes, there are no relevant DTCs stored in the engine control module (ECM) or signal acquisition module (SAM). • Run a Quick Test to check for any relevant fault codes.
Why are my cooling fans not turning on?
If the compressor is running long enough to build heat in the high side of the system, and the cooling fans don’t turn on, I would begin finding the fan relays and add power to the appropriate circuit to see if the fans turn on at all. This will require a wiring diagram.
How does a radiator fan work when the AC is on?
The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. At higher coolant temperatures, the switch closes to start the cooling fans. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range.
When does AC is running, do the condensor fan and radiator fan?
When the Air Conditioning (both front and rear) are running manually (non-auto) and set at maximum, do the condensor fan and radiator fan run at high speed? I asked because my AC is not working and I can’t prove to the dealership that it is not.
For example, at a coolant temperature of 51.0°C (123.8°F) the refrigerant pressure should be no more than 12 bar. If it is higher, the air-conditioning control module presumes that the pressure is high and assigns the fan control module to run at 90% PWM actuation.
This problem is often caused by a faulty pressure sensor located on the air-conditioning condenser. If accessing fault codes, there are no relevant DTCs stored in the engine control module (ECM) or signal acquisition module (SAM). • Run a Quick Test to check for any relevant fault codes.
If the compressor is running long enough to build heat in the high side of the system, and the cooling fans don’t turn on, I would begin finding the fan relays and add power to the appropriate circuit to see if the fans turn on at all. This will require a wiring diagram.
