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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I, I have York hvac blower motor(brand new) running gh OHMS

Customer Question

JA: I'll do all I can to help. How long have you been dealing with this?
Customer: I have York hvac blower motor(brand new) running High OHMS gets hot and shuts off. I thougt well maby its a bad new motor. Got another one and its doing exactly the same thing
JA: Just to clarify, what type of HVAC system is this? Single, multi-staged, or zoned?
Customer: not sure. here is the model number p4hub16n06401a
JA: Do you plan on doing the work yourself?
Customer: i have been . I am a general contractor for 20 years. This is a new one on me
Submitted: 8 months ago.
Category: HVAC
Expert:  airheatman replied 8 months ago.

Do you have a meter to check voltage.Often low supply voltage will cause high amp draw.

Customer: replied 8 months ago.
reading low med and high all reading aroud 119 120 ish
Customer: replied 8 months ago.
Already replaced the mother booard. new thermostat as well as new capacitor..all ckeced out well within limits
Expert:  airheatman replied 8 months ago.

OK voltage is good.

Did you replae capacitor along with motor and verify they gave you right micofards

Customer: replied 8 months ago.
Expert:  airheatman replied 8 months ago.

Coil clean and good airflow?

Customer: replied 8 months ago.
new filters
Expert:  airheatman replied 8 months ago.

Silly question, but direction of rotation correct?

Customer: replied 8 months ago.
Customer: replied 8 months ago.
I run just the fan only to isolate the issue as to the blower motor but gets really hot turns off and seems to cool down and re starts until it gets hot
Customer: replied 8 months ago.
Would a bad ground or a bad common make it draw higer ohms?
Expert:  airheatman replied 8 months ago.

Bad ground should not.I almost would say another bad motor,possible out of same run of motors if it came from same place.

usually rotation, low or high voltage, a restriction in air flow weak or wrong cap or wrong motor are things that would make it overheat

Customer: replied 8 months ago.
Bench tested capacitor. its is reading great, Motor is from different place different manufactor. second was a York exactly the one factory put in. I am at a loss
Customer: replied 8 months ago.
Voltage is good. All 120 ish on low, med, and high runs
Expert:  airheatman replied 8 months ago.

Yes, this is a rare one.My first inclination is to say replace the motor but you have already done this I am going to open to other experts to see if they have ideas without repeating what we have verified.They will be able to see what we have covered.If no one can help, we can request a refund.

Customer: replied 8 months ago.
roger ill stand by
Expert:  airheatman replied 8 months ago.

Doesn't appear other experts have any ideas besides what we have covered.Would you like me to request a refund?

Customer: replied 8 months ago.
Expert:  HVAC Guru replied 8 months ago.

Are you sure the motor is a 120 volt motor and not wired for 240?

Customer: replied 8 months ago.
I'm sure
Expert:  airheatman replied 8 months ago.

One thing I did not ask, did you verify the uf on the capacitor with a meter? The cap even if new could also be weak.

Customer: replied 8 months ago.
it checks out good on a bench test within specs. just refund it all. I will have to get some serious help for this one from the outside