Check the furnace s air filter your furnace may be blowing cold air because the filter is too dirty.
Electronic ignition furnace blowing cold air.
Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building.
A dirty air filter blocks airflow over the furnace s heat exchanger causing it to overheat.
Electronic ignition gas furnace problems troubleshooting gas furnaces are a prevalent form of heat for homes and businesses and occasionally a gas furnace needs to be repaired because of a problem with the gas furnace.
Because an electric ignition does not.
The standing pilot light was the regular way to ignite gas powered furnaces for almost as long as these heating systems have existed.
But now an electric ignition system have started to replace pilot lights.
My electronic ignition furnace won t ignite.
It s possible your furnace overheated.
The blower keeps blowing to cool the furnace down to a safe level.
Although the furnace may be sending heated air into the ductwork by the time it gets to the registers it may only be cool air blowing out.
Since there are many different types of gas furnaces it is difficult to cover every single possible gas furnace problem that can occur with a gas furnace in one article.
If so the limit switch a furnace safety device turned the furnace burners off.
Broken or peeling duct tape broken mastic or ductwork.
Your thermostat settings need to be adjusted you have leaky air ducts your fan limit switch settings need to be adjusted.
Fred paul getty images if your gas furnace is blowing cold air a number of factors could be to blame many of which you can address on your own without the immediate help of a service professional.
Have an expert inspect your ducts along with the furnace.
2 furnace overheated let s say your furnace blows hot air then cold air but then stops blowing any air at all after a while.
Well if your furnace is blowing cold air it s most likely due to one of these problems.