Question about Heating & Cooling
Posted by Anonymous on
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Posted on Jan 02, 2017
Check your furnace filter any Limit fault code usually relates to airflow...Not enough...causes the furnace to run too hot and shut off....the furnace can be too big for your house if its new...the ductwork can be too small , also make sure your return air vents are clean and unobstructed . Your furnace can be running too long a cycle ....also if you have central air conditioning the coil for the AC in the Furnace can be dirty...restricting airflow...if all this seems ok you can usually increase the fan speed or try tunning the fan in the "On" position on your thermostat this will promote better circulation
Posted on Oct 25, 2009
It's mounted onto the gas valve. It will be a button or lever that you have to push in or down, depending on the style.
Posted on Nov 20, 2009
Goodman furnace new in 07 Red LED lite flashed the three code..It was frosted and iced over closing down air flow at intake and exhaust out side of house. Use a hot hair dryer if you can't dislodge.
Have had a lot of sub zero weather here.
The ignitor can be seen glowing in the top peep hole.
The Red trouble shooting LED lite is in bottom peep hole.
Posted on Jan 10, 2010
it sounds like the low temp limit switch, the one that cools the furnace down with the burner off and the thermostat open, when it cools to a point the fan stops, the other switch in burner area turns burner off/on, hope this helps
Posted on Jan 31, 2010
f this is a metal vent 80% furnace,Turn Furnace off
and remove the vent that connects to furnace and see if it is plugged.
If this is a High Eff furnace witrh pvc vents for
exhaust and intake air make sure they are not plugged on the outside.
Turn thermostat all the way up,turn furnace off and
wait a few minutes.This should reset any control
Turn the furnace back on, if you have a glow coil
ignitor it should glow red and then the burners should
ignite. If this doesnt happen then:
On High Eff Furnace if the glow coil does not glow red, remove the combustion door to the burners,
turn furnace back on, if the glow coil glows and
burner ignites, you have an obstruction in the intake
air side. If it still does nothing then:
Use caution and remove the exhaust vent from furnace, start furnace, if furnace runs then you
have a problem with the vent system
Posted on Feb 13, 2010
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