Ask Experts Questions for FREE Help !
Ask
    discreet1's Avatar
    discreet1 Posts: 3, Reputation: 1
    New Member
     
    #1

    Jul 8, 2009, 06:06 PM
    Outdoor condenser fan goes into thermal protection mode
    My outside unit condenser fan motor would run fine, when pushed by a screwdriver, or the like, but would not start on it's own. I replaced the motor with the IDENTICAL unit, name brand and all, but the wires were different. I also replaced the capacitor. As it turns out, the capacitor they sold me was the wrong one for the compressor and motor together, but the right one for the motor by itself. But (I think) I have eliminated it as a bad unit, as I measured the voltage at the wires with the new and old units. The old fan had three wires, purple, black and brown. The new one came with black, brown, yellow and brown with a white stripe. Both motors have diagrams on the side, and I got the hot(yellow) and common(black) wires hooked up fine to the 240, but if I pick one of the other two to hook up to the capacitor, it won't start at all. I spliced both wires together, and the fan ran for about long enough for me to button up the housing and it thermal protected and stopped.=me mad: The motor was definitely hot to touch. The motor is an A.O.Smith, 1/6 hp, 9 amp 208~230 volt motor. Virtually identical to the old one... except the wires and colors, and the new motor spins at 1075, and the old one at 840 rpm. The outdoor condenser is a Janitrol, made by goodman mfg. inc. and our thermostat is a programmable honeywell unit. I am USUALLY quite competent at this sort of thing. But I am at a complete loss for what to do next. PLEASE HELP!!
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
     
    #2

    Jul 8, 2009, 07:54 PM
    Both the brown and the brown/white strip should go the new contactor one to each side, one on one post the other on other post,, should work providing you havn`t burned up the new motor
    The rpm`s should have been the same as the old motor although 840 rpm sounds a little slow,, but its OK better to be running faster than to slow, someone could have replaced the original with a motor that runs to slow for most the 1075 rpm is the right speed
    Let us know
    siberianair's Avatar
    siberianair Posts: 360, Reputation: -4
    Full Member
     
    #3

    Jul 9, 2009, 04:50 AM
    Some goodmans run at 875 rpms...
    discreet1's Avatar
    discreet1 Posts: 3, Reputation: 1
    New Member
     
    #4

    Jul 10, 2009, 08:51 AM

    Thank you all for your much appreciated help. Turns out, the four wire motor needed it's own capacitor. I simply left the compressor on the original capacitor, and usewd the new one for the fan motor. I also had the yellow wire going to the wrong power source. OMG! I feel so dumb now that I understand!

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Thermal protection device open [ 2 Answers ]

Getting 4 blinking lights. Furnace lights kicks on and works for like 5 minutes then shuts off but the fan keeps blowing then it repeats over and over again.

Outdoor condenser [ 2 Answers ]

My indoor fan stays on and outdoor condinsor will not come on until I push in the contactor what couyld this be

How to verify direction for outdoor condenser fan [ 5 Answers ]

I have an air-conditioning unit ( & heat pump) that does not seem to be cooling very well. About a month ago the outdoor fan quit spinning and the service tech replaced the starter capacitor. FWIW the whole unit was replaced in 2005 It runs now but seems to be running slow and the outdoor...

Screeching fan motor in outdoor condenser [ 10 Answers ]

Hi, My 18-month-old home has two condensers in the back yard; one is working fine, the other woke up half the neighborhood at 3am this morning when it started screeching until I shut it off. Aside from the noise, the fan is turning. I've noticed two things, either of which I think could be the...


View more questions Search