Front Duo Therm A/C high speed fan issue?
Hello All, today and for the next 5 days we are in 90+ temps. I ran both front and back AC's with no issue. Actually, we rarely run the units and I have never had an issue in the 7 years we've owned this coach. Today I decided to change the speed on the front unit from low to high. After I changed it, it went to high speed and then a few mins later made a weird noise then eventually made a louder sound and then the unit basically shut down. I pulled the interior vent cover off and could spin the squirrel cage. I ran up on the roof and took the shroud off and didn't see anything abnormal. I checked the breaker in the panel and it was fine. I check the small 5amp? fuse on the circuit board in the front unit and it was good. I was going to check to verify I had 120V to the unit when I couldn't find my small meter. Shoot. I decided to turn on the unit in low speed and the blower came on. I said a few nice words and after a minute or 3, the compressor came on and is now working fine. I'm afraid to go to medium or high speed until after our trip when I get home. When I was on the roof, I studied the motor that runs the squirrel cage and the duct around it seems flimsy and rattles there. I'm wondering if on high speed, the fan gets unbalanced and maybe it moved a tiny bit on the shaft and hit the aluminum casing and caused my problem? I need to recheck the rubber mounts on that motor as it seems as if it can move depending on how fast squirrel cage is spinning. It was too hot up there to do much else for today. Does anyone know if the high speed runs off a different relay, or are all the speeds controlled by the same controller? Anyone replace the rubber motor mounts or take the squirrel cage off for inspection and re-install? I'm sure with more time I can find my problem but being under the gun with 90*+ heat and my family angrily staring at me, it's frustrating. Thanks in advance for any help you can offer.
2003 Monaco Knight 36ft- 315 ISC
2007 Jeep Grand Cherokee 3.0 Diesel 4x4
2- 2013 Yamaha VXR's 70MPH+ on aluminum trailer