View Full Version : Blowing fuse about every three days in the heat of the day
07-03-2009, 11:02 PM
I am working on a heat pump with a scroll and it is blowing the main fuse. I
replaced the cfm, bfm, comp cap, and contactor that were all in very bad shape. the compressor running amps are good. Lock rotor amps are good when I am there. What am I missing is the compressor getting stuck internally on occasion?
07-03-2009, 11:09 PM
Maybe the fuse/breaker is unable to hold the amps when other loads are running while the a.c is on...too many loads on one path...?
07-03-2009, 11:24 PM
That is a good thought, The amps check out its pulling 35 amps at the disconnect and blowing one of them. I put a 45 amp in to see and three days later it blew.
07-03-2009, 11:26 PM
Check your wire size, junction boxes, breaker clamps, and voltage when unit is running. Also sometimes breakers need a break too.No just kidding? Breakers do go bad.
07-03-2009, 11:33 PM
Is it possible after checking all the above that the compressor could have a problem
07-03-2009, 11:35 PM
I realize its not an everyday thing
07-03-2009, 11:43 PM
well if you put a new cap...it shouldnt be the compressor...like acfixer said check your wire size...ect...
07-03-2009, 11:59 PM
Is there a TD in the stat or the ODU? If not, might be trying to restart to soon b4 equalizing.
07-04-2009, 12:00 AM
Use your infrared to check for loose/failing connections at fuse holder and line connections.
07-04-2009, 01:37 AM
call a professional :)
07-04-2009, 06:51 AM
Use your infrared to check for loose/failing connections at fuse holder and line connections
I`m with Steve, there is an overheating connection someplace
07-04-2009, 07:48 AM
I agree with Beachtech, call a service tech.
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