I have a Moffat Oven Model:E32MS, fan motor runs very slowly, sometimes runs ok and suddenly start running slow again and stop working when oven is on. Question is: Is the problem in the motor or the capacitor? Thanks
That oven runs from a single-phase electrical source. The capacitor is used for starting the motor and shouldn't have any bearing on the motor's performance at rated RPM.
Speaking of "bearing", even as pricey as that motor is, its rotor shaft bearings are probably simple sleeve bearings (vice roller bearings). SO...it sounds like they're wearing out. You can try working a little machine oil into them to get a bit more life out of the motor, but you're just buying time. You're going to need to replace the motor. Here's the part number:
Moffat M236268 MOTOR E27 & E32 MAX | Parts Town
I DO suggest replacing the capacitor too, since that's just good practice. The capacitor works as a team with the motor and will eventually fail on its own. Its failure would be evident by the motor just humming instead of ramping up to speed when you turn the oven on. Most motors come with a new capacitor that's mounted piggy-back on the motor. The capacitor for that oven appears to be separate, so may not come with the new motor. If so, then here's the part number for the capacitor:
Moffat M236269 CAPACITOR 3MFD E27,E32MS | Parts Town
Based upon your inquiry, my guess is you might be fairly adept with tools. This manual will be in handy:
Changing the motor isn't too difficult. Getting the blower wheel off the old motor would be the biggest test. Do you have a puller in your tool box?
Before taking it off, take note of how the blower wheel is positioned onto the old motor's shaft. Do the motor exchange and try to match that. Make sure your electrical connections are clean and TIGHT. Once it's in with the blower wheel SECURELY installed and baffles are in place, check it out by running the oven up to highest possible temp setting. Expansion from heat may cause the wheel to hit things and you'll need to adjust the blower wheel position accordingly.
You may also want to check the motor timer. The change may be in the reversal circuit.
I receive parts from parts town today, motor and capacitor installed and problem has been resolved. Thank you
Glad the TechTOWN users and Parts Town could help Thanks for letting us know, it really means a lot.
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