Question about Goodman GMS90703BXA Heater

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A/C won't turn off regardless of thermostat setting ? GMP075-3 w/ 2 ton A/C

It is now the middle of a hot summer . The system is cooling fine but a problem has developed where the A/C and fan stays on regardless of the thermostat setting . I can only tun it off by placing the switch thermostat in the off position (between heat and cool ) . I suspect that is probably a bad control board or thermostat . How do i diagnosis this further ? - Thanks

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If you are able to shut the system down by using the thermostat as mentioned, the thermostat is either bad or the programming is messed up. Check the fan switch and turn it to "Auto".

Posted on Aug 07, 2008

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Why does it interfere with the A/C?


this all depends on the location of the thermostat that will only cool the area where it is at that tempature that you have it set on if you have a hotter room then you have to either turn it up to a higher setting cooler or make sure your ducts are open or insulate that room better it is to hot

May 26, 2015 | Honeywell Heaters

Tip

Becoming more efficient with your heating and cooling


Here are some ways to become more efficient with your heating and cooling. Obviously you do not have to do them in order but try to complete as many as you can! = )
· Buy a laser thermometer! You can use this to detect air leaks (or at least areas with “minor” temperature differences) so you know where to put seals
· Keep blinds shut on hot days and open on cold days----helps reduce temperature extremities
· If the temperature is can be negated by using a t-shirt or a jacket, use that clothing! You will save temperature control costs and still be able to keep warm or cool
· Do not use those old lightbulbs on hot days---they make extra heat increasing cooling bills (but you can use them on cold days to help warm your house)
· Utilize energy star products to increase efficiency comfortably
· Set your thermostat as low as is comfortable in the winter and as high as is comfortable in the summer.
· If you are on vacation, turn of that air conditioning/heating! No one will be in the house if everyone is away and it shouldn’t be too uncomfortable to wait like one hour for the house to cool/heat
· Don’t turn your thermostat up/down just to heat/cool faster---all temperature control changes the house temp at the same rate and if you forget to turn it off, you just wasted some energy there!
· Don’t block heating/cooling vents so that your rooms can be controlled quickly and so that your air actually gets controlled, not your furniture
· Check up your air conditioning and heating systems regularly (not once a month but maybe once every year) so that the systems stay running the best they can
source:
http://www.savingsnut.com/heatingcooling.html

on Dec 07, 2009 | Heaters

1 Answer

Rth9580wf1005 changing setting on own


There may be a sudden weather change or heat change that may set it of. Also it might help to double check your settings just in case one of the buttons or dials have been knocked.

Mar 01, 2014 | Honeywell Electronic Programmable...

1 Answer

Utica furnace hot water system problem


Check the heat Antisapator on the thermostat, or replace the thermostat.

Nov 13, 2013 | Heaters

1 Answer

Gmp 100-3 fan runs even when tstat is set to off an fan setting to auto. unit ran fine all summer in cool mode and was off for the last couple weeks. just notice the fan was on yeaterday. ran unit in...


Hello, one way to check is remove the green wire from the G termimal on the circuit board in the Furnace, if tn
His turns it off it may be a short in the tstat wiring or bad thermostat, if it does not turn it off the relay on tne control board is stuck and tne entire board must be replaced.

Sep 28, 2011 | Goodman GMS90703BXA Heater

1 Answer

Need to wire a honeywell RTH7400D thermostat to 3 wire hot water


Just mark the old wires on the old thermnostat...R , W etc...and put them on the same terminals on the new 1.....also there should be some adjustment ire : switch on the back or under the cover to adjust for Hot water heating or electric heat...either is the setting you should have it on....also you shouldn't setback the thermostat at night or when away very much....2 degrees is fine , as the boiler will run along time to raise the temperature in the morning and may not get there by the set time

Oct 18, 2009 | Honeywell Electronic Programmable...

1 Answer

Fan will not work in "auto" for heat request. fan works fine in "on". digital display on thermostat goes out during heat "auto" request. 24v transformer was weak, so replaced that. now, still same problem,...


What brand of thermsotat do you have, if it's working on auto and not calling on heat then the thermostate is most likey bad the metal plate on the inside may be wore down, you may be able to pry it up to make it work but it you ggive me the thermostate brand I can give you exact details hot to fix.

Oct 08, 2009 | Goodman GMS90703BXA Heater

1 Answer

TOO HOT


not sure how you system is set up but it almost sounds like you have a maintain system or a stuck thermostat to stop the heat if you dont make hot water with this boiler turn off the switch on boiler till you can get service person in if you can tell me more about the way your system is set up i could help more.if you want to see if its a problem with thermostat pull red wire from subbase

May 02, 2009 | Honeywell Electronic Programmable...

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