look under the hood it sould be in a box that says fuses or realys
The heater fan relay is an electrical component in a vehicle's heating and ventilation system that controls the operation of the heater fan motor. When the driver or climate control system activates the heater, the relay receives a signal and closes the circuit, allowing electrical current to flow to the fan motor. This enables the fan to operate and circulate warm air throughout the cabin. If the relay fails, the heater fan may not function, leading to inadequate heating.
For optimal ventilation, the fan should face out the window.
Swap the fan relay with another like relay.
An HVAC fan relay is a switch that controls the operation of the fan in a heating, ventilation, and air conditioning system. It helps regulate the flow of air throughout the system by turning the fan on and off as needed. This contributes to the overall operation of the HVAC system by ensuring that the fan runs efficiently and effectively, helping to distribute heated or cooled air throughout the building.
A fan is used
For optimal ventilation, a window fan should blow air out of the room.
If your ventilation fan in a Peugeot 406 won't switch off, it could be due to a faulty fan relay, a stuck blower motor resistor, or an electrical issue, such as a short circuit. It's also possible that the climate control system is malfunctioning. Check the fuse and relay first, and if those are fine, you may need to inspect the blower motor and control module for any defects. If you're uncertain, consulting a professional mechanic is advisable for a thorough diagnosis.
fan control relay
Exhaust fan is only use for exhaust the old air, while ventilation fan is use for both purpose intake and exhaust.
Before you fix the Fan Relay, look for a "RAD FAN" fuse (30 amp - orange). Normally, the computer diagnostic shows the problem is the Fan Relay, but, in my case was the Radiator Fan Fuse ($5). I waste $60 paying for the Fan Relay :-[
Yes. Cooling fan, engine fan, and radiator fan relays are all the same thing.
You can look on the old ventilation fan that is in your bathroom. Or you can research on the internet what type would be needed in yours.