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Old 09-06-2012, 06:56 PM   #1
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Heil AC Fan wont turn on

My Heil bmm060nkb bm2620ga Ac wont come on. It sounds like it tries then kicks out then tries again in a few seconds but wont come on. I tested the run capacitor - it measured 12.4 uf and on the capacitor it says 15uf. Do I need a new run cap or can someone point me in the right direction.

I am stuck with DIY because after calling 48 repair places the earliest anyone can com is next thursday and it will cost 400.00 per hour. I doi live in the sticks.

I am pretty good with my hands but want to get expert advice first. None of these guys would even talk to me.

The years ago I changed the time delay relay. The unit is about 14 years old.

Thanks in advance for any help I can get.



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Old 09-06-2012, 07:09 PM   #2
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I capacitor will also have a percentage rate printed next to the uf number, would look something like this on your 15uf:

15uf +/- 10%

What that means is this particular cap is good for that motor for up to 1.5 above 15uf (16.5) to 1.5 below 15 (13.5uf), taking 10% of 15 and adding or subtracting from it to achieve that number range. Your actual cap may only be plus or minus 5%, not 10. The percentage rates vary per cap.

Most condenser fan motor capacitors are not going to be above 10% of the uf number. Change that cap, it's too weak to start that motor.


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Old 09-06-2012, 07:45 PM   #3
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make sure you discharge the cap before you touch it, if you don't know how make sure you don't touch the leads or you'll get a little surprise.
Affordable Comfort, assisting with furnaces Barrie and surrounding area, as well as offering 24 hour furnace repair
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