| Author | Message | ||
| Austin Scott Davis (Zimtok)
Registered Member Username: Zimtok Post Number: 428 Registered: 9-2006 Posted From: 209.156.24.114  Rating: N/A |
OK my older rooftop air unit on my 4104 just died. The motor/compressor is locked up. I have been thinking about replacing this one anyway as it is the older unit. Does anyone have a good used unit (not too old) or what do you recommend for a replacement new unit. . | ||
| Laryn Christley (Barn_owl)
Registered Member Username: Barn_owl Post Number: 670 Registered: 10-2006 Posted From: 153.2.247.30  Rating: N/A |
Did the compressor itself lock up or is it the fan? What brand is it, and how old? I have two 1979 Dometics on my bus and I have had to add a squirt of Freon to one and lube its fan bearings to keep it going. It has been my experience that compressors themselves are tough, and often the problem is something else. | ||
| George M. Todd (George_todd)
Registered Member Username: George_todd Post Number: 1072 Registered: 8-2006 Posted From: 99.62.7.26 Rating: N/A |
Zimtok, Have you checked the start capacitor? The compressor won't start, and will blow a fuse with an open capacitor. The compressor will run with a shorted capacitor, but will overheat and trip its internal protector, which should reset in a few minutes. Wire burned off a terminal on a switch, capacitor, or compressor? Not to say you haven't done this already, and you do have a true locked rotor? G | ||
| John MC9 (John_mc9)
Registered Member Username: John_mc9 Post Number: 1166 Registered: 7-2006 Posted From: 74.162.79.161  Rating: N/A |
Austin - Try what Laryn suggested, most of the time that fan/compressor shaft only needs to be unfrozen with some good PB and WD-40. | ||
| Austin Scott Davis (Zimtok)
Registered Member Username: Zimtok Post Number: 429 Registered: 9-2006 Posted From: 209.156.24.114 Rating: N/A |
Thanks guys.... The fan was turning hard so I spun it by hand for a while and it freed up for a couple days. It is now hard to turn again so I guess I'm going to have to climb on the top and do some lubrication.... I know from the P.O. that they have had trouble with this unit before a few times. They have replaced the starting capacitor a couple times and I think he said something about lubricating something.... It is a Coleman according to the sticker under the inside panel but no model number is listed... This one was installed in 1986... . (Message edited by zimtok on July 20, 2010) | ||
| Jim Wilke (Jim Bob) (Pd41044039)
Registered Member Username: Pd41044039 Post Number: 524 Registered: 2-2001 Posted From: 184.0.3.170 Rating: N/A |
I have had to lube a fan motor or two and replace one. It's not so bad, just go on a 50 mile trip first to dislodge & lose the wasps that nest in there between trips. I have actually had the fan be stuck in place by mud daubers cementing a nest to the blade and the guard. Cleaning that out got the AC running just fine. If it's the fan you will hear the compressor run normally but but no air flow. If the compressor is siezed, it will trip the breaker. | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1928 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
Thanks a lot guys!!! I was going to offer him 10 bucks to use it for "parts"..wink..wink. |