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Old 06-29-2012, 01:04 PM   #1
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Verify capacitors for York heat pump


My heat pump fan is intermittently failing to start. Upon one failure, I was able to start it by giving it push with a stick. This did not work on two other occasions. I don't have a capacitance tester and neither the run or start capacitors look blown (no leaking oil, no bulging); besides everything works 80% of the time.

I'm going to replace both capacitors. I've discharged and removed both. One seems to be readily available (SE7537-0) but the other is likely a replacement part (I can't find matches online). Can someone confirm that the current parts are the correct parts (in case a previous technician used the wrong replacement part)?

Heat pump details:
York
Model: E2HB024S06A
Serial: MBWM077933

Run Capacitor details:
2 terminal
SE7537-0
7.5 microfarad +/- 10%
370VAC 50/60Hz
Protected

Start Capacitor details:
3 terminals ("FAN", "C", "HERM")
187C527H32
AEROVOX Z64P3735D
30 +5 microfarad 370 V 60Hz
Protected C10000AFG
Aeromet
also, "8616" is printed sideways with the other label details
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Old 06-29-2012, 05:04 PM   #2
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Verify capacitors for York heat pump


Those are both run capacitors. Good chance your condenser fan motor was change out with a rescue motor, and that 7.5 is what that motor calls for. the dual run cap shouldn't be connected to the fan anymore.
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Old 06-29-2012, 05:46 PM   #3
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Verify capacitors for York heat pump


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Originally Posted by beenthere View Post
Those are both run capacitors. Good chance your condenser fan motor was change out with a rescue motor, and that 7.5 is what that motor calls for. the dual run cap shouldn't be connected to the fan anymore.
Thanks beenthere! There was a wire connected to the fan terminal of the 30/5 capacitor. I did not follow it back to see if it actually connected to the fan.

I just finished replacing both capacitors and I reconnected the same wire that was originally connected to the fan terminal of the 30/5. Everything is running but now I'm wondering why the fan terminal is still hooked up. What kind of problem would it cause if somehow both the 7.5 and dual are connect to the fan motor?

Thanks again!
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Old 06-29-2012, 05:49 PM   #4
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Verify capacitors for York heat pump


if they are wired in parallel, then you'll get 12.5 uf, if in series you'll only get 3uf. Either way, a short life span for the motor.
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Old 06-29-2012, 05:59 PM   #5
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Verify capacitors for York heat pump


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if they are wired in parallel, then you'll get 12.5 uf, if in series you'll only get 3uf. Either way, a short life span for the motor.
Thanks again! I know the motor was replaced because it was done shortly after bought the house. I had to call the warranty company after that failed. Another guy came out and said the first guy did it wrong. So they made the first guy come back out. Now it's a 14 months later. Combined with what you're telling me and the questionable work I'm feeling like I have to look a little closer.

I'll check to see if the motor is actually connect to both capacitors.
I'd also like to make sure 7.5 is the correct rating for the replacement motor. Should that information be on the motor label? If so, how would it be labeled?

I'm now wondering if my motor is starting to fail and it's not actually the capacitors.
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Old 06-29-2012, 06:03 PM   #6
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Verify capacitors for York heat pump


It will be on the motor. Somewhere it will be marked, 7.5 uf, or mf.
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