Question about Goodman GMS80903BNA Heater

1 Answer

Furnace fan comes on as directed by thermostat set to Auto but no heat produced. Gas in home OK as indicated by visible pilot light on water heater which is working.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,420 Answers

Your system has a diagnostic light that blinks a code if there is a problem. look at the lower section of the heater, there should be a small viewing port looking into the cabinet. you may have to remove a cover but if you remove the wrong one, it cuts power to the unit and erases the error code. once you get the code, look on the wiring diagram for a diagnostic chart. this will give you a starting point where the problem is.

Posted on Oct 11, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Pilot light lit but not igniting to heat water


pilot lit on gas furnace, but the burners won't light (Home ...

answers.angieslist.com > Home > HVAC
Oct 26, 2013 - i have a gas furnace with a lit pilot, but the burners won't light. ... if the thermocouple does not sense the heat of the pilot it prevents the gas controller fromturning on the burners. ... clamped onto the outgoing hot water pipe, if huydronic system) that is telling the furnace it is too hot, whether or not that is true.

Nov 18, 2015 | Water Water Heaters

1 Answer

How do I light pilot light?


There should not be a pilot on a direct vent furnace. When you turn up the thermostat for heat the 1st thing to happen is a venter motor should start, it should vent for approximately 45 seconds, the air switch will verify a vacuum in the burner box, then a spark igniter should start clicking to start the pilot, then the flame rod will verify the pilot, the igniter will stop clicking, and the main burner will ignite and remain on until the thermostat has satisfied the set point. These guideline steps must be satisfied before the controller advances to the next step. The 1st step is the venter motor running, sometimes the motor will stick over the summer months, spin it manually to unstick it. PS, nothing runs if the fan door cover is open, as that shuts down the power to the whole furnace.

Oct 02, 2015 | Coleman Gas Fired Mobile Home Furnace,...

1 Answer

SO basically my furnace just stop kicking on the heat at some point last night. I have it set on an auto temp around 70. By the time I noticed it being cold in the house I went up to the thermostat and...


I want you to do a simple test to verify that this is a thermostat problem for me. Start by removing the thermostat from its' mounting, next locate the red and white wire terminals place a jumper between them. If the heater now runs it is the thermostat went bad on you, if it does not run please check all connections both to the thermostat and to the furnace making sure that your wires have tight connections and are not broken. I am really leaning towards the thermostat being bad here. Sorry for the bad news but really strong feeling. Good luck

Jan 12, 2011 | Goodman Heating & Cooling

1 Answer

I have an early 80's mobile home with an "intertherm gas atmospheric furnace" pilot light is lit but can't get the furnace to "fire". Seems as though the limit control is stuck open. ...


If your pilot light is lit then I would first check your thermostat. Make sure it is on heat setting and fan is on auto, turn stat up to where it should be calling for heat. If you don't get burner to light remove front cover from thermostat and see if it has a mercury switch, if it does move temperature selector up and down and see if you can see a spark in mercury switch vial. If y ou cannot see a spark remove screws that attach t-stat to base.Remove carefully and disconnect wires that go to r and w terminals on stat base. Temporarily connect these two wires together. This should make burner light if you have power to thermostat. If burner does light disconnect wires and replace thermostat. Also if you have a volt meter check across these two wires and see if you have power there. Should be around 24 volts a.c. If your thermostat has a fan on setting try that. If fan runs you know you have power to furnace The gas valve needs 24 volts to operate and inside the electric control box in furnace there is a transformer to step down 110-120 supply voltage to 24 volts. If transformer is working you should be able to hear a low buzz or humming sound. You can also check across gas valve terminals when t-stat is set for heat, you should read about 24 volts. If you have 24 volts to gas valve and it is not opening then you need to replace gas valve. The main purpose of the limit switches is to turn blower on when temperature in heat exchanger reaches fan on temp,shut off blower after burner shuts off and heat in heat exchanger reaches fan off temperature, and limit if temperature exceedes set point without blower coming on. I hope this helps you. Thanks

Nov 25, 2010 | Heating & Cooling

1 Answer

Older heater, late-60's gas in mobile home. When furnace ignites it blows back and puts out the pilot light? Also, seems to be a delay when the thermostat clicks to come on til the furnace lights thus...


Check your exhaust pipe for blockage, Make sure pilot light is located just above or below the burner. Make sure that there is a good supply of air going to the burner and that the intake pipe (if it has one) is not restricted. A furnace that old needs to be replaced what ever you find. You could have a cracked heat exchanger.

Nov 06, 2009 | Cozy (W352E) Heater

3 Answers

Replaced mercury thermostat w/Honeywell CT87K - doesn't work!


You need a specific thermostat for a Wall Furnace it is a Millivolt Thermostat and not a 24v standard thermostat....usually it will work anyway however if the powerpile (generator produces millivolts from the pilot light) is weak it may not be producing enough...or the Pilot light may be dirty and lazy...won't produce enough millivolts ...or you can have bad or dirty contacts or connections....or a combination of any of the above.....a 24v Thermostat and particularly a non-mercury thermostat has too much resistance in it for a millivolt system....as your Wall Furnace (other than the fan) runs on less than 1 volt

Oct 31, 2009 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

We have a Janitrol PGB 048125-1 unit and it is not blowing heat. the fan comes on when in fan only mode on thermostat but once we turn it to auto it goes off. we cannot get the unit to blow hot air. does...


If the unit is newer than 10 years I guess there will be no pilot light per sey. You will have to look at it to tell for sure. Here it is supposed to work. When there is a call for heat the thermostat will close and send a signal to the furnace to start the exhaust blower. When the blower gets up to speed, it closes a pressure switch that will send voltage to the gas valve and to the igniter. The igniter glows or sparks lighting the pilot. Once the pilot lights it sends a signal that all is well, then the gas valve opens up more and the burner(s) light. There is a sensor that tells the control board when the flame has stayed lit. Once that is done, after a period of time or as the heat exchanger gets to a specific temperature, it will turn on the room air blower and blow hot air. Once the thermostat has been satisfied, the furnace turns off. Now, get in front of the furnace and with the door panels off (you may need to tape down the door safety switch to make this work) watch the furnace go thru each step I described. Once you see where the problem is, you can start the proceed of repair. There may even be a flashing light indicating a problem. Find the wiring diagram on the furnace and look for a diagnostic chart and compare the number of blinks to this chart.

Oct 17, 2009 | Goodman Heating & Cooling

1 Answer

My heater will not light. It is eletric ignition, there is power coming into the unit.


In order for the furnace to light, a few things must happen. The thermostat must have a call for heat thus making a connection (closing a switch) sending a signal to a computer circuit board. The board will in turn blink a light indicating a call for heat is registered. It will then send power to a fan motor that will remove old air from the burner area and introduce fresh air to the burner. Once the blower comes up to speed, the pressure closes a a pressure switch. Once the switch closes, it sends power to an igniter, either a glow type or spark type. It also sends power to one side of the gas valve to open up the pilot gas valve and send gas to the pilot assembly. Once the computer senses there is heat at the pilot valve, it will open up the second gas valve and send gas to the main burner. The trick is to know where it is going wrong. First you must watch this sequence to follow the workings. To do this you may have to remove some panels on the furnace and hold a door switch closed temporarily to trick the furnace to run. Follow the sequence above to find where it ain't happening and look at what must be done to fix it. It could be as simple as a bad thermostat (no call for heat) or a plugged exhaust vent not allowing the pressure switch to close. Let us know how you make out with the diagnosis!

Oct 13, 2009 | Coleman Propane Forced Air Heater...

1 Answer

Poilot light is on but furnace will not turn on.


check diverter at pilot chech for lint could be gas valve re-light pilot

Oct 11, 2009 | RTO Home Heating Products 5.5HH240...

Not finding what you are looking for?
Heating & Cooling Logo

71 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Heating & Cooling Experts

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

paulcarew

Level 3 Expert

2517 Answers

Brandon Berry
Brandon Berry

Level 2 Expert

407 Answers

Are you a Goodman Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...