Re: PW Dependability


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Posted by KenaiGary [65.74.48.28] on Saturday, March 03, 2012 at 17:54:08 :

In Reply to: Re: PW Dependability posted by Jerry in Idaho [69.59.83.175] on Saturday, March 03, 2012 at 01:10:53 :

Thanks for the kind thoughts, Jerry. Finally figured out the fan motor so I think I have something worthwhile for the forum.

My MOPAR heater is shown on the first page of my WM 300 parts book, but doesn't show the model number, but I believe it is a Model 79. The fan motor I bought from VPW (the only one they carry) is not the same as the one in my unit, but it's close and the only one I could find. I had to cut the posts down on the inside where it connects to the fan unit, but that worked out OK, but no air was blowing even though the fan was spinning strongly.

I learned today after some trial and error that my heater fan is supposed to turn counterclockwise. The motor I bought is for a Model 75 and 77. These had squirrel cage fans and they spin clockwise. So when I originally installed the motor the fan was cutting the air rather than blowing it. Actually it was blowing it, but back toward the heater core.

So I reversed the polarity running the motor ground to the heater power switch and the original power to the ground, which reversed the fan direction. Works like a champ and I can now drive this winter. Bring on the snow!

Dad is failing and I hope to have a bed in a nursing home up here in a month or sooner. Yeah, being a caretaker from 3,500 miles away is tough. I work 12-14 hour days, work on his issues about 3 hours or more daily and spend the rest of the time moving snow around every few days. But, it's the way it is and is nothing compared to the folks in the Midwest dealing with the death and destruction of their homes and towns.

Working on the truck today was therapeutic and I will be doing some more minor things tomorrow while it is in the garage. And, will drive it around in the snow with a warm cab and clear windshield.



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