The cooling fan wiring diagram below is what we ve found to be the simplest and most reliable method.
Dual cooling fan relay wiring diagram.
This is based on the draw from the fans if the fans are larger and draw more than 15 amps each it s recommended to install a second relay kit as shown below.
With dual cooling fans there are two methods for wiring up the relay kit.
It uses a 40 amp electric relay and electric fan sensor.
Or a single relay could be used to control both fans.
Electric fan relay wiring diagram wiring diagram is a simplified tolerable pictorial representation of an electrical circuit it shows the components of the circuit as simplified shapes and the capability and signal contacts between the devices.
For example dual thermostat switches or dual relays could be used to control each fan separately.
Cooling fan relay wiring diagram how to wire a fan relay hvac in dual fan relay wiring diagram image size 730 x 656 px and to view image details please click the image.
However two relays will divide the load.
And if a relay fails you will still have one fan running.
Wiring dual cooling fans.
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You could use one relay.