Re: 4th speed fan switch

[jtrealty@xxxx]

Things to check for a "missing" 4th speed. A bad fan switch.
A bad 4th speed relay. A problem in the wiring from the thermal trip 
to the relay to the fan motor. Since the fan works in 1-2-3 speeds it 
rules out a problem in the mode switch and the fan motor. The first 
thing to try is switching the 3-speed relay with the 4-speed relay. 
Make sure that all of the connecters are in correctly ie: none of them 
have backed out of position and then are not making contact with the 
relays. Inspect the fan circuit breaker for all of the wires to be 
connected in particular there should be 2 brown wires on 1 side of the 
breaker (1 brown wire goes to the 3-speed relay and the other brown 
wire to the 4-speed relay). The most likely trouble is the relay and 
the next most likely is a slipped connecter in the relay block. The 
speed switch doesn't fail very often. To rule out a wiring problem you 
could pull the 4-speed relay and with a paper clip jump the brown and 
pink/black wires to get 4th speed. If the fan then runs check the 
black wire for continuity to ground and power at the pink/light green 
when you put the sped switch in 4 speed.
David Teitelbaum
vin 10757

--- In dmcnews@xxxx, "Ryan Foster" <westiething@xxxx> wrote:
> I know this might sound silly, but the fourth speed on my fan 
doesn't work.
> 1. Could this be a bad switch?
> 2. could this be a bad fan motor?
> 3. any other ideas this could be?
> 
> Thanks for any help!
> 
> Ryan- vin.#16301

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