lhw455
New Member
Hi all, new homeowner who inherited a bit of an old HVAC system. The problem I've been having is that the blower motor/fan doesn't spin up i.e. when I set the fan to "on" on the thermostat, it mostly doesn't spin up, I just hear a humming sound. When it does start, it runs for awhile and then shuts off (and the motor gets quite hot to the touch).
I initially replace the capacitor (which I believe is a run capacitor) with the equivalent (it was labelled a GE capacitor, 370V at 5 MFD.
This didn't solve the problem, so I've now taken out the motor to search for a replacement. It's a GE 5KCP39JGN226BS (old). I managed to find a replacement second hand motor (same model) off eBay (not sure if there is a modern equivalent, but my Google skiils failed me searching for a compatible model.
Anyway, while I wait for the replacement motor, I noticed that the motor has a label (i.imgur.com/hcPdkne.jpg) which includes the text "7.5/370v" with a * next to it that says "5/370v required for some units"
So my question is the following: should I be using a 5 MFD capacitor or a 7.5 MFD capacitor. Also, is there a replacement model motor I could look into i.e. how do I go about sourcing a replacement should the "new" one fail again?
Thanks in advance
I initially replace the capacitor (which I believe is a run capacitor) with the equivalent (it was labelled a GE capacitor, 370V at 5 MFD.
This didn't solve the problem, so I've now taken out the motor to search for a replacement. It's a GE 5KCP39JGN226BS (old). I managed to find a replacement second hand motor (same model) off eBay (not sure if there is a modern equivalent, but my Google skiils failed me searching for a compatible model.
Anyway, while I wait for the replacement motor, I noticed that the motor has a label (i.imgur.com/hcPdkne.jpg) which includes the text "7.5/370v" with a * next to it that says "5/370v required for some units"
So my question is the following: should I be using a 5 MFD capacitor or a 7.5 MFD capacitor. Also, is there a replacement model motor I could look into i.e. how do I go about sourcing a replacement should the "new" one fail again?
Thanks in advance