SO SO Lost??? Changed Board And Motor And Still Nothing - HVAC - DIY Chatroom Home Improvement Forum


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Old 12-21-2010, 09:15 PM   #1
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SO SO Lost??? Changed Board and Motor and still nothing


Okay...
So I changed my mainboard and motor as per my service guy said on his ticket when he came out

I changed the board
and connected everything back to where it belongs
(because I labled every wire)

then took out the blower motor
and got a new one
Same spec plus a new capacitor

Now... here is the kicker...

Cooling is working, Furnace lights up and is burning...

but no blower running
the motor is just not running

is there a way I can jump some thing to make it run

I have a 4 speed

Please Help

As I am about to go away for the Holidays and dont want my pipes to freeze

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Old 12-21-2010, 09:33 PM   #2
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SO SO Lost??? Changed Board and Motor and still nothing


what are your blower wires connected to on the board? also does the fan run continuous if you move fan to on position on stat?

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Old 12-21-2010, 09:38 PM   #3
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SO SO Lost??? Changed Board and Motor and still nothing


okay

here is what I got

yellow = M2
red = fan
blue = heat
black = cool
white = neutrals
brn/w = cap
brn = cap

NO FAN... Motor will not run
this a brand new board and unit
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Old 12-21-2010, 09:43 PM   #4
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SO SO Lost??? Changed Board and Motor and still nothing


Quote:
Originally Posted by kuteazn1 View Post
okay

here is what I got

yellow = M2
red = fan
blue = heat
black = cool
white = neutrals
brn/w = cap
brn = cap

NO FAN... Motor will not run
this a brand new board and unit
remove black wire from board connected to x-fmr. put black wire from cool on this terminal. push in door switch. if it runs then no signal from board to motor. if not then bad motor.
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Old 12-21-2010, 09:49 PM   #5
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SO SO Lost??? Changed Board and Motor and still nothing


did this to the last board too
by past it to get the motor running
(the HVAC Tech did this still have his jumper)

got new board and new motor

now same problem

I did the black to XFMR and still nothing

can it be the thmostat?
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Old 12-21-2010, 09:53 PM   #6
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SO SO Lost??? Changed Board and Motor and still nothing


no. if that did not work then you need a meter to check voltage from board. if your not getting anything from the motor when you put the fan to on on stat or in cooling or heating, then it is most likely the motor. check for 120v between fan (red) and neutral (white) when fan is on at stat and system is off @ stat
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Old 12-21-2010, 09:54 PM   #7
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SO SO Lost??? Changed Board and Motor and still nothing


i think i am gonna have to bite the bullet and call a HVAC guy to come out and fix it...
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Old 12-21-2010, 10:09 PM   #8
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SO SO Lost??? Changed Board and Motor and still nothing


if I dont get 120V

what could be the problem
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Old 12-21-2010, 10:11 PM   #9
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SO SO Lost??? Changed Board and Motor and still nothing


board. ck for 24v between g and c
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Old 12-21-2010, 10:17 PM   #10
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SO SO Lost??? Changed Board and Motor and still nothing


i just bought this board

so right now I dont have a meter reader
so I am heading to Wally World to get one...

will be back in 45 mins

and let you know what I find out
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Old 12-21-2010, 11:36 PM   #11
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SO SO Lost??? Changed Board and Motor and still nothing


okay so CY I get nothing CR I get 24

the Red/Black/Yellow/Blue into White
I get 127 V

so is the CY the deal breaker?
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Old 12-22-2010, 03:05 AM   #12
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SO SO Lost??? Changed Board and Motor and still nothing


Why do you have red going to fan? That is supposed to be on a park terminal when not used.

Your heat wire should be the blue one only.
If you are measuring voltage off all your motor wires than that is not normal.

Hookup the blue and the white motor wires to a voltage source. I f the motor does not turn over it might be ruined. The fan terminal has a different function and sounds like it caused you motor to back feed thru all you motor windings. That will burn them out if not remediated quickly enough.

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