Furnace Blowing Out Cold Air

Once airflow to the furnace is no longer blocked your furnace will be less likely to overheat and should function normally. Your furnace may be blowing cold air because the filter is too dirty. The solution is to replace your dirty air filter with a clean one.

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You hold your hand up to an air vent and sure enough cold air is coming out almost as if the air conditioner is running.

Furnace blowing out cold air. Your furnace is overheating. Most commonly a dirty furnace air filter. Large holes and leaks in air ducts can make it seem like your furnace isn t. A not so obvious cause for a heater blowing cold air.

Have an expert inspect your ducts along with the furnace. Check your pilot light. Your fan limit switch settings need to be adjusted. Gas furnace blowing cold air.

Change the air filter and see if your furnace starts only blowing warm air. In such cases a safety control device known as the limit switch will shut off the burners. You have leaky air ducts. 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.

Your thermostat settings need to be adjusted. If your furnace seems to be blowing cold air. However for more complicated issues you will need to involve an hvac technician. A furnace blowing cold air could be due to your thermostat.

Furnace troubleshooting from asm. The blower keeps blowing to cool the furnace down to a safe level. If you notice your furnace only blows cold air on occasion but your home is still maintaining its temperature than this may be simply a setting on your thermostat. If your furnace overheats it could end up blowing cold air.

A dirty air filter blocks airflow over the furnace s heat exchanger causing it to overheat. The dirty air filter will block airflow causing the furnace to run longer to heat your home until it overheats. 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. Your gas supply could be turned off.

However the fan will keep running cooling the furnace to protect it from potential damage. If your oil furnace is. Well if your furnace is blowing cold air it s most likely due to one of these problems. When your furnace overheats you will only get cold air.

Restricted airflow can cause your furnace to run longer to heat your home until it overheats. One of the most common causes of a furnace blowing cold air is not actually a repair at all. The fan setting on your thermostat has two options on and auto. Overheating will almost always occur due to restricted airflow and this is often caused by a dirty air filter.

So what causes the furnace to overheat. The good news is that you can solve the simple problems on your own. Several possible problems can cause your furnace to blow out cold air. Other causes of furnaces blowing cold air pilot light ignition problem.