Old furnace suddenly stopped heating
#1
02-02-15, 01:22 AM
Old furnace suddenly stopped heating
NOTE: The furnace has no Manufacturer label on it, just a model#
Hey all. Moved into an old mobile home a couple weeks before winter set in. Furnace worked fine until the whole East coast blizzard thing hit. Now it wont heat, AND its making a buzzing noise. Cranked the thermostat up and nothing. Changed the Fan setting to "ON" (from auto) and that kicks in, but blows cold air.
Dont want to go messing with anything just yet without checking with people who have some heating/cooling knowledge.
Any help would be appreciated. Its -4* out and the in-home temp is dropping fast
Model: MGHA-090ABPQ
*hopes its just a blocked intake vent somewhere*
Hey all. Moved into an old mobile home a couple weeks before winter set in. Furnace worked fine until the whole East coast blizzard thing hit. Now it wont heat, AND its making a buzzing noise. Cranked the thermostat up and nothing. Changed the Fan setting to "ON" (from auto) and that kicks in, but blows cold air.
Dont want to go messing with anything just yet without checking with people who have some heating/cooling knowledge.
Any help would be appreciated. Its -4* out and the in-home temp is dropping fast
Model: MGHA-090ABPQ
*hopes its just a blocked intake vent somewhere*
#2
02-02-15, 06:52 AM
The manufacturer is Nordyne. Are there any Flash Codes on a display?
903106 Codes
Try to find the control board & it's model # to be sure that I have the correct list, of codes.
903106 Codes
Try to find the control board & it's model # to be sure that I have the correct list, of codes.
#4
02-02-15, 12:07 PM
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I don't think there is a board which would give you a blink code on that furnace.
A common problem with that model is the combustion air blower going bad. On the right side of the burner there is a small motor. Shut off the furnace give it a couple of minutes & turn it back on. Does that small motor run?
A common problem with that model is the combustion air blower going bad. On the right side of the burner there is a small motor. Shut off the furnace give it a couple of minutes & turn it back on. Does that small motor run?
#5
02-02-15, 12:28 PM
I've turned it off via thermostat (if thats what you mean). dosen't seem to be any other on/off switch aside from the thermocoupling/gas valve switch (red push lever labeled "ON" "OFF" and "PILOT").
Also, I noticed the pilot light wasnt lit. Not sure if thats the problem, or if it uses an ignitor. In any case, I'm going to let the area vent out a bit, as I smelled a faint natural gas smell. Turned the lever on the valve to "OFF" just in case.
Also, I noticed the pilot light wasnt lit. Not sure if thats the problem, or if it uses an ignitor. In any case, I'm going to let the area vent out a bit, as I smelled a faint natural gas smell. Turned the lever on the valve to "OFF" just in case.
#6
02-02-15, 02:02 PM
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That furnace has, or should have, an ignitor. It should not have a pilot setting on the gas valve. Did you try turning the stat back up to see if that small motor comes on?
#7
02-02-15, 04:04 PM
Apparently the previous owners of the home didn't maintain the furnace at all.
Found the culprit;
The park I live in offers free heating/cooling inspections. called them up and someone was over within the hour. The blowers work, but with all the snow we got, the exhaust pipe was blocked, so it would circulate inside the ignition chamber and blow out the flame. The CO detector went nuts when he tried to light the pilot.
And speaking of which... The combustion chamber was a hot mess.
From the retractable camera hose thing, all you could see was rust: Seams were so rusted/corroded there was a visible gap between them. Basically, whenever the furnace kicked on, a draft from the blowers would also help put out the flame.
He then went under the home to look at the pipework. Said the pipes are most-likely all original; been there for 20 years (age of the home). He said the piping looked more like gnarled tree branches.
Found the culprit;
The park I live in offers free heating/cooling inspections. called them up and someone was over within the hour. The blowers work, but with all the snow we got, the exhaust pipe was blocked, so it would circulate inside the ignition chamber and blow out the flame. The CO detector went nuts when he tried to light the pilot.
And speaking of which... The combustion chamber was a hot mess.
From the retractable camera hose thing, all you could see was rust: Seams were so rusted/corroded there was a visible gap between them. Basically, whenever the furnace kicked on, a draft from the blowers would also help put out the flame.
He then went under the home to look at the pipework. Said the pipes are most-likely all original; been there for 20 years (age of the home). He said the piping looked more like gnarled tree branches.
#8
02-02-15, 05:06 PM
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The park having free heating & cooling inspection is a nice benefit.
I must have been looking at a newer version when I saw the ignitor.
Sounds like a new furnace & ductwork to me.
I must have been looking at a newer version when I saw the ignitor.
Sounds like a new furnace & ductwork to me.
