The ac and heater fan will not turn off - AC Cars & Trucks

You relay switch is stuck on. Replace it. Second thing to check is the fan switch may need to be replaced. If you turn off your engine and then back on does the heater fan go on even when it is turned off at the switch?

Normally the ac fan (in front of the condenser) will run as soon as the ac is switched on. This condenser gets hot when the gas is being compressed and needs to have the heat removed for the system to work IT will switch on regardless of the ambient temperature as it is connected directly to the ac compressor clutch. IF you are referring to the heater fan inside then it will only work with the heater fan on or with both ac and heater on but will not always work with just the ac on.

Make sure your fan is working properly. When you turn on the heater you are forcing the fan to cool the radiator. It may not be turning on automatically when it is supposed to. Let us know if this helps..

my acura tl fan turn on when i turn on air conditioning why

motor could be bad or something fell down defrost and locked up the fan.

you probley need to replace the heater controls

You need to replace the heater/AC blower motor the motor shaft bearing is defective..

try changing the compressor relay

your blower motor has gone bad and it over heats and shuts down

is the switch on dash in one piece as on these cars the bottom of the switch breaks ,you push switch to turn on a/c and turn it for the fan left is re circulate right is fan with fresh air in as well