janitorial (Goodman) Furnace won't ignite gas
I purchased a used Janitorial (Goodman Furnace) Supposed to be natural gas gmnt080-4 90% 80,000 BTU.
I did not attempt to install until today almost a year later.
I have everything hooked up and it seems to work as it should it just does not ignite. Here is the process...
When I set the thermostat to heat...
1. a click then, a small exhaust fan turns on (this is the fan connected ti the PVC Exhaust)
2. a click then, the igniter receives power and glows red. Exhaust fan is still on.
3. a click then, the gas is released. at this point 15 seconds later the igniter dims and gas shuts off. IT repeats this 3 times and stops. The red LED on the control board of the furnace blinks till you power off or switch the thermostat to off.
When I select fan to on from auto...
1. Larger blower motor kicks on like it should.
Some things I tried,,,
The flexible gas line was rated at 60,000 BTU and was upgraded to a larger diameter line that supports 100,000+ BTU the furnace is 80,000 BTU.
What concerns me....
The 2 thin wires coming out of the gas control valve going nowhere (see pics once uploaded. Are they for AC?)
I can see the remnants of one of those yellow converted to propane stickers. It has been scratched off. Hoping it was converted to LP then back to NG.
I don't know if the fittings are the same on a LP furnace not sure it is physically possible to attach a NG line to something that is LP. So, I'm not sure about this theory.
Orifices I don't know what a natural gas one looks like but I know they matter. Could it have LP orifices? Is some thing else going on? There is a gas valve in place are those valves rated to a certain BTU rating limiting flow?
:censored: is going on? Thanks for the help winter is coming.
OK problem or one of them is that this :censored:ing thing is propane. The guy who sold it lied. Orifice are stamped #55. I drove in the rain out to the country (should have been a clue) to pick this up.
So now I need new orifices and a spring.
I have trouble finding the correct orifice size for my model i think it is #43. Can anyone help?
best bet is to call johnstone supply they handle goodman..or check on line for the parts you need....welcome to buying used stuff... ben sr
They used to call themselves janitrol back in the day,I used to call them jani-junk back in the day before goodman bought them out and improved them greatly.
Im not sure if jonstone supply/j-mart will sell to the public in your area but its wort a try,you could check on line at ecomfort.com or someplace like that though.:)
Thank you all. I ended up ordering the gas valves and orifice from sears parts direct. They are supposed to be calibrated to the required water column.
I am in the next phase of my HVAC install and I have a question about the furnace condensate drain.
I have seen instances where the condensate drain is fitted to a T that connects to a 3" primary vent, is this necessary? I assume this is done because it is a mixture of gases and liquid. Am I correct? A trap is also required in the drain line to prevent exhaust gasses escaping. Correct?
Thanks all just want to know what I am dealing with CO2 kills.
ok Janitrol then.. lol. Thanks! :thumbsup:
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