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Old 12-17-2018, 06:27 PM   #1
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Dash fan

I am unable to get my dash fan/heat air to come on. the fan did come on after I bought it. but now has stopped working, here is what I have done
checked voltage at the fan motor=none. I can jumper the relay contacts and the fan will run. thinking it was the relay I replaced it . It still doesn't come on. I have checked the vacuum pump and it is working. (thought it was just for the blend doors but.... anyway).
so here is what I am thinking is that it is the dash switch.
anyone one else have any thoughts? not really concerned about the heat but I really need a defrost.
1999 Winnebago Itasca Sunflyer
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Old 12-18-2018, 08:34 PM   #2
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There might be a resistor that sometimes has a thermal limiter(AKA fuse, non reapiarable) that blows. Usually that causes no low or med speeds. I would check at the relay again with the fan switch in the high position to see if your getting voltage from the switch on the control wire for the relay. That resistor I'm talking about is generally a 3 wire connector mounted on the heater/AC housing.
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Old 12-20-2018, 01:54 PM   #3
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Quote:
Originally Posted by cptdzl View Post
There might be a resistor that sometimes has a thermal limiter(AKA fuse, non reapiarable) that blows. Usually that causes no low or med speeds. I would check at the relay again with the fan switch in the high position to see if your getting voltage from the switch on the control wire for the relay. That resistor I'm talking about is generally a 3 wire connector mounted on the heater/AC housing.
Thank you I will check it out
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