Question about Goodman GMS90703BXA Heater

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Goodman seer 12 amps to high

Problem is that it's amps are high 20.19 total unit and it's breakin that breaker 40amps. purchase 2004. we cleaned it out all the coils yesterday and it was run at 16.99 amp regular and now it's started again,,,,waz up!!!! help we live in az

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Breaker is bad

Posted on Sep 01, 2008

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Have Goodman GDS81155CNA, throwing open high limit relay. Have to pull main breaker to get to reset. I have already taken the entire furnace apart and cleaned it (completely, motort, evap coil cleaned,...


What about the safety limits for over heating? You have tackled all obvious problems, I am only throwing this out there because while the high limit is jumped out, to get the open high limit is definitely strange. So i would be tracing my wiring backwards from the relay to see what else is in line with it. This is not a solution but only a suggestion before running out to purchase the main control board, as most places will not accept a board back if that is not the culprit. Good luck with this one it leaves me slightly puzzled??

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I have a 1991 model gmn100-4 furnace and air con power supply 115 volts 1ph60hz less than 12 amps my problem is when fan moter kicks in the air unit does not i checked and theres power from breaker box to...


Hi Jimmy, yes, I bet it is hot with that high humidity. From what you are saying, it sounds to me like this pusher switch is the contactor at the out door unit. It has the power lines going into it, and out the other side. It will have contacts on it that you can push down, is this what you are talking about when you say pusher switch? The indoor unit is 115 volts, you are right about that, but the outdoor unit contactor/pusher switch is 230 volts. You should have a box mounted by the outdoor unit for high voltage. Most all of the disconnect boxes have 2- 30 to 35 amp fuses inside them. You may not see them, so pull the plug and the plastic cover in the box to see if you have them. If you do, you may have blown a fuse. Replace both of them. This box is powered by a breaker at your main panel also. You will have a double pole breaker and make sure its not tripped. This contactor has a 24 volt coil on the bottom of it and is energized by the thermostat which closes the contacts to send power through to start the unit. You have to have 230 volts there. Turn the stat on cooling and go out to see if the pusher/contactor switch is energized. If so and the unit is not on, you have no high voltage there to run it, so check for fuses and the main breaker. You have power to the indoor unit, but not the out door unit. Start here and do these checks. Keep me posted on this Jimmy, and get back to me if this does not start the unit or if you trip a breaker. I will be watching for you. We will get it going. If this does the trick, be sure and rate me kindly as I know you will. Keep me updated by my user name below.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor.

Aug 02, 2010 | Goodman Heaters

1 Answer

Goodman unit blows 45 amp fuses only in heat mode, worked fine all summer on a/c. It works well for some time then blows them again.


Check the breakers on the unit How many KW--electric heat? Check to see if you have the right wires wired up to the correct breaker cause some units have 40---and ---60 ---amps breakers and your thickest wire could be wired to the 40-amp breakers,, (some 5 KW pullls 19-23 amps respectably some breakers have 7.5 KW heat stips and pulls more and if the wire size can,t cary the amps, then all you have to do is reduce a heat strip.

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A picture is worth a thousand words. Check out this link for the best explanation.
http://www.alpinehomeair.com/related/diagrams_10.pdf

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1 Answer

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How many amps is your service? And what gauge wire did you use for the heater?
If your service is only 40amps that is your problem. You don't have enough amps for the heater and the rest of your house, you will have to upgrade your service.

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