Electronic Ignition Furnace Blowing Cold Air

Broken or peeling duct tape broken mastic or ductwork.

Electronic ignition furnace blowing cold air.

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. 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. 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. The blower keeps blowing to cool the furnace down to a safe level.

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. The standing pilot light was the regular way to ignite gas powered furnaces for almost as long as these heating systems have existed. Why is my furnace blowing cold air.

If so the limit switch a furnace safety device turned the furnace burners off. It s possible your furnace overheated. To troubleshoot a misbehaving gas furnace start with the easiest explanations and solutions then work your way to the most complicated. Because an electric ignition does not.

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. Your thermostat settings need to be adjusted you have leaky air ducts your fan limit switch settings need to be adjusted. When overheating your furnace can trip a high limit switch causing the furnace burners to shut off so that the heat exchanger does not crack. Well if your furnace is blowing cold air it s most likely due to one of these problems.

But now an electric ignition system have started to replace pilot lights. My electronic ignition furnace won t ignite.