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Replaced blower motor on coleman ac

Replaced the blower motor on my coleman roof top ac but still have to spin the squerrel cage by hand to get it to run and once I spin it by hand it runs fine how do I check either the start or run caps or relay

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You MUST always replace a capacitor when you replace a capacitor start/run device.
Replace the cap.

Posted on May 24, 2009

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What causes a repetitive, rapidly repeating, hammering or slapping sound in my rv roof top ac?


It's sounds like a critter may have started to make a nest in the blower motor fan. I recommend trying to clean out the fan motor squirrel cage.

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If it hasn't been running for a while, try going up on roof (AC in off position) and using a stick, or similar piece long enough to slide it through air slots in cover and spin fan blades a few times. It may only go a little at a time but keep going until you make 2 or 3 rotations. Then remove it and have someone try fan mode only. If it runs, let it run for a few minutes and , from then on it should be o.k. If you can't get at it to spin it enough with stick, remove screws on top of cover and remove cover and spin by hand (carefully and power off to AC), then try to start it. If motor hums but still will not start by itself, have capacitor replaced. Very dangerous to handle so either have someone who's familiar with capacitors do it, or a technician.

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well check a few things first....have someone remove the cover and reach in with a hand and try to manually spin the blade...free spinning?....then tell the person below to click in the on postion while someone views from up top.....is it humming? or even trying to spin?....if not check the fuse on the RV that protects the A/C unit.....good?.....now replace the capacitor ( it the silver or gray can looking thing that the motor wires run to) only the correct size will work w/o causing further motor damage.

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I have a 2002 Jayco Kiwi Hybrid. My roof ac hums when turned on. I replaced the motor and it didn't fix problem. If I give the squirrel cage a little push, it will run but won't start on it's own. AC blows...


Sounds to me like a bad capacitor. Look for it around and wired in with the motor - should have 2 wires going to it. SAFETY - don't touch the terminals or you will say naughty words involuntarily!!!! Test this and if bad, replace with a replacement with EXACT SPECS. This should take care of ya.....

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you have 2 windings that are in you motor,One winding is the start winding It give the motor its initial boost that gets the fan spinning.The other winding is the run winding and it takes over and keeps the fan running.So it sounds like the motor is bad because the start winding is not giving the boost it needs to start. good luck--Nate

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