Aux fan stopped working. Will run with temperature switch disconnected
from drier and terminals jumped. Tried disconecting temp sensor on
thermostat housing (with engine running) and grounding lead to engine
but fan will not operate with this test. Fuse is okay, checked with
voltmeter and getting ~10v on both sides of fuse terminal. Sounds like
a faulty relay, but I don't know location of aux fan relay. Any help or
Your aux fan only runs on A/C high side temp. It is NOT controlled by engine
The temp sensor on the thermostat housing is the cold blower lockout.
It keeps the blower fan from turning on when the engine is cold. As the water
warms up, then the
blower comes on. This feature is overrode when defrost button is pushed.
There are no water temp sensors on a 617 engine for the aux fan.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.