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Old 03-23-2012, 02:54 PM   #1
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Original 1979 AC?

According to the many manuals I received with my 79 Pace Arrow serial numbers match up for both roof top AC units. Since we're on shore power I can only run the front one right now but the rear has been tested under generator load for about 15 minutes or so and worked. Well today in this West Texas heat I'm running the front one and its been just over two hours and no icing of coils. Plenty cold air coming out. Hows that for luck!

1979 "Vintage" Pace Arrow 28 Ft,
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Old 03-24-2012, 01:47 PM   #2
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It didn't warm down as much as was forecast for last night so around 4 am I turned it back on low. Thermo setting about 4. Had to move it up around 9 am to max. Still working great. Next job I'm gonna change all fuel lines and fill the main tank. Run both off the 6.5 genny. Gonna find out stuff. I seriously had doubts about the guys who built this thing but I could be in error!

1979 "Vintage" Pace Arrow 28 Ft,
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Old 03-24-2012, 02:33 PM   #3
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Be sure to open up the top cover and then the electrical box and check the condition of the capacitors. I also have the original AC on my 78 however the old timey capacitors were finally giving up the ghost. Each capacitor body should be crisp and well formed like it was just made, not bulged and/or possibly leaking. You should have 3 capacitors in each unit:
Compressor Run Capacitor
Compressor Start Capacitor
Fan Capacitor

While a new capacitor may be the same electrical value, they are physically much smaller than they were in the 70's due to improved manufacturing processes. Values depend on the Mfg/model of the AC but are written on the side of each capacitor.

Make sure the evaporator and condensor coils are clean of dirt, bugs, bug nests and the fins are in good shape (not bent reducing air flow through the transfer coils).

Take some time and clean all electrical connections topside under the AC cover. Time and humidity take their toll on the connections reducing voltage/current to the fan & compressor resulting in premature failure because they have to work harder.

Dave in Virginia
1978 Winnebago Chieftain
Dodge M400 - 440-3
Classic Winnebago Site: http://www.classicwinnebagos.com/forum/index.php
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