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ThugRen 04-17-2012 11:55 PM

Trane XR90 Blown Control board!
Hey there guys, I am need some Info. I have notice that my Control board has blown out on me. I woke up one morning and smelt some burns components. When and Check and notice it was my control board part # 50A65-475 White-Rodgers Intell-Ignition? So I am not sure what caused this too blow out? So I am bit neverous about put in a new board to have that one fry out too? I noticed it seem to be on the main fan as it doesn't want too start? but the Fan will spin freely? Is there anything else I can or should check or change for I Install this?

REP 04-18-2012 12:17 AM

The only thing you can do is take a chance that it was a bad board.
If you replace the board and then discover there is another reason for the bad board well you will have to get a third board.
I think at this point it would be wise for you to call a trane dealer.If he burns a new board,he has to get and pay for a new one.

ThugRen 04-19-2012 07:39 PM

Board was a $170 shipped call a deal $200.00 to come and look at it.. I am Thinking I will test that Cap and go from there.. I would be a head just chancing the board..

Doc Holliday 04-19-2012 07:51 PM

Boards sometimes just blow, I replace them all the time.

You need to ground yourself against the metal cabinet of the furnace prior to handling the new board (static electricity) and try your best to only handle it by the edges.

bobinphx 04-20-2012 09:24 AM

slow this trane down...yes it was a pun!!!

what blew on the board????? was it a connector?? was it an IC chip???? was it a resistor??? maybe the 24volt transformer cooked...

a picture or two of the board would really help everyone here figure out what happened.... Then you can make a better judgement on what to replace.

thanks in advance.

Doc Holliday 04-20-2012 07:16 PM


Originally Posted by bobinphx (Post 903002)
slow this trane down...

:( ............................:thumbup:

Look on the back of the board for any burn marks. Usually it'll be a solder connection gone bad and the electricity jumps, sometimes to the panel behind or under the board, leaving a burn mark on both.

ThugRen 04-20-2012 11:29 PM

Okay. So I have replaced the board but this new board is coming up with a open rollout swich error.. Fan is come on but heat? Fan doesn't want to shut off?

ThugRen 04-21-2012 02:22 AM

So I got Heat Finely! I didn't Realize I need too connect that jumper on the main clip on furnace from R01 and R02.. As for Trane Furnace's..

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