What is a fan motor relay?
In a blower motor, the relay supplies the power that allows the fans to circulate warmed air. Essentially an on/off switch, the blower motor relay’s reactions start and end the heating process in HVAC systems by controlling the flow of current between the power source and the motor.
How can I troubleshoot my HVAC fan relay?
HVAC Electrical Troubleshooting -Fan Relay! If playback doesn’t begin shortly, try restarting your device. Check out The Book! Finding Low Voltage Shorts Fast! HVAC Troubleshooting! This Channel Strives to answer HVAC questions with a Step by Step Procedure!
What is the fan motor in an AC unit?
What is an AC Fan Motor? The fan motor is a fairly uncomplicated yet vital part of an air conditioner. It’s the part of the unit that pumps air through the system. Without that circulation of air, your AC won’t cool your home.
Where do you wire a new condenser fan motor?
If you purchased a new condenser fan motor with a new single run capacitor, this will be the wiring setup that you’ll be using. You’re going to wire the black lead to where the black lead on your previous condenser fan motor was wired to. This will likely be back to your contactor.
How does the contactor work on a condenser fan?
This switch is controlled by the thermostat and closes to complete an electrical circuit when electricity needs to be supplied to your condenser fan motor and compressor. Think of the contactor almost as a gatekeeper – two legs of 115 volt electric supply need to flow through it in order for your system to function properly.
When to turn on the cooling fan relay?
The cooling fan relay is an electromagnetic switch that controls the power supply to the engine’s cooling fans. It ensures that the energy-intensive devices only run when needed, usually when the vehicle is immobile. When the engine temperature approaches unsafe levels, the vehicle’s computer or temperature switch turns on the cooling fan relay.
What does the manual say about a blower relay?
The manual may refer to a blower relay, an AC relay, or a cooling fan relay. If it says blower relay, you’re golden; if it says AC relay, you might have what you want. If it says cooling fan relay, it’s talking about the relay that controls the radiator fans. Some cars have something called a power relay or an “unloader” relay.
What are the different types of fan relays?
There are several types of cooling fan relays. Their main difference involves the winding armature that they use to complete an electrical circuit. The most common type of relay uses an open armature. When the relay coil gets energized, the armature closes. The completed circuit allows the current to flow to the fan motor.
Can a bad fan relay cause an engine to overheat?
However, a bad cooling fan relay isn’t the only culprit for excessively high engine temperatures. Many other issues can cause the engine to run hot or overheat. Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running.