Goodman Circuit Board replacement for GSU: need wiring schematic

Perry_2

Unsealed electronics (and some other items) are generally not returnable.

It is also correct that the board may not be the fault - and installing a good board only gets you another burned out board. I went through that a few years ago when I was working in a machine shop. The stated rule was that only I worked on the circuit cards and controls for the CNC machines (I was the shop electrition and electonic/controls expert). We even kept the control cabinets locked.

Of course, there was a problem with the main CNC machine and one guy "knew" he could figure it out. So dispite three people telling him to get me - he got the key from the office, opened the cabinet, and noticed that one of the LED idiot lights was out on one of the three axis control boards. Since he only needed two axis control to finish the job - he figured he could just swap cables between the cards to use the axis he was not using and be back into business. He did that. The same idiot light went out on the second board when he powered up. As a final test of his powers to repair things he decided that he could actually get by with one axis control and manually feed the other - and switched cables to the third card. Then the third idiot light went out.

The problem was that the servo motor had failed on that one axis, and shorted in a way that burned out the servo drive card for that. What was needed was a new servo and one new axis control card (not to mention recalibration of the machine so that it would machine a round hole). What we endid up buying was a new servo and all three axis control cards. Those axis control cards were about $1800 each. The owner of the company was not pleased...

So, is the boiler card the problem. Perhaps. Perhaps it is something else and the new card will be instantly blown. Or that their is really nothing wrong with the card and it is something else... preventing the card for doing its job.

Arn't electronics fun. Relays never had that kind of problems.

Perry

Kelly Hengesteg

Cold in Seattle

I need help in acquiring the wiring schematic for a Goodman furnace GSU100-4 circuit board replacement (replacement circuit board B1809923). I hired a heating expert to fix my furnace. He stated the circuit board needed to be replaced. I found a board on-line and have the updated wiring harness but no schematic. I called Janitrol to fax me the schematic and they said they would... they are now closed and I don't have the schematic. Hoping someone out there might be able to help.
Thanks,
Kelly

tom_49

Are you changing the board yourself or is the pro doing it?

Heatman_2

Usually Goodman upgrade kits account for existing wiring. Usually straight forward instructions included?

Kelly Hengesteg

Wanting to do it ourself just need the wiring schematic.:)
Do you have a suggestion?
Kelly

Kelly Hengesteg

Unfortunately, they didn't include the wiring schematic. I am hoping that someone out there has one:)
Kelly

MikeB34

replacing the board

if the existing is there, simply do it wire by wire. the new board will be the same as the old, and have the same terminals. simply remove one, and put it on the new board.

repeat until all wires transfered. remove old board and install new one.

Rheems are tight but you can do this.

Alternaively. get some masking tape and pabel each wire with the terminal marking it is on, remove wires. replace board, and re attach wires.

If the board is not the same, then you have the wrong board.

Mike B

Empire_2

Board replacement.

What caused the original board to go bad? No disrespect intended, but what people will do to save money......I just hope the furnace does not kill you and your family. I would call him back for a run inspection just to make sure.

Mike T.

don_156

Hello Mike

Would you return knowing she shop your price?It obvious that she think her hvac guys is not worth the money he
quoted to replace the board.

Those internet company are very cleaver.Of course they did
not include a wiring diagram they want you to screw it up
so they can sell you more parts or a new furnace.

In fact I'll bet if you were to call them back and tell them that the board does not work they will ask you did you have a professional to do the install.

Of course your anwser would be no...and then they will say
sorry but,it states it has to be install by a professional so your warranty is void.
But that the problem you dont want to pay a pro to do it.He
too high.

Now you end up here where you hope one of us will tell you how to do it so you did not have to pay the going rate.

And we being our worse enemy, do just that.



A

Empire_2

Amen Brother Don

People step over the dollar to pick up the dime....What really blows my mind it they request free information so they can do this. I don't give out free heat loss calc's, and this is along those same lines.

Mike T.

S Ebels

Even with a pro installer.........

Many companies will not accept returns on electrical components that are not in the sealed original container. This is because the are expensive, easy to screw up/burnout and are many times not the problem in the first place. Integrated boards are pretty reliable in most cases but many people have the urge to change it out because they don't understand it and can't trouble shoot it. Therefore, "it must be the board".