Why is my electric furnace blowing lukewarm air?

Eda Watsica asked a question: Why is my electric furnace blowing lukewarm air?
Asked By: Eda Watsica
Date created: Fri, Jul 23, 2021 1:58 AM

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Those who are looking for an answer to the question «Why is my electric furnace blowing lukewarm air?» often ask the following questions:

👉 Why is electric furnace blowing cold air?

If the sensor is failed, it might not signal the blower fan to turn off. This, of course, would cause the electric furnace to continue to run without creating heat – and would be the electric furnace blowing cold air. Solution: Check the temperature setting on your thermostat and the temperature of the air. Most digital thermostats show both.

👉 Why is my electric furnace blowing cold air?

If the sensor is failed, it might not signal the blower fan to turn off. This, of course, would cause the electric furnace to continue to run without creating heat – and would be the electric furnace blowing cold air. Solution: Check the temperature setting on your thermostat and the temperature of the air.

👉 Why is my electric furnace blowing cool air?

Your furnace may be blowing cold air because the filter is too dirty. A dirty air filter blocks airflow over the furnace's heat exchanger, causing it to overheat. 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.

10 other answers

Air ducts are leaking The lukewarm air coming out of your furnace can also be the result of leaky air ducts. If your ducts are leaking (and ENERGY STAR says that almost all homes leak about 30% of the air in their ducts), cold outside air is making its way into your ductwork. This can cause the air to feel only lukewarm.

Over a short period, the fan will turn the air cold or lukewarm at best. Air filters keep the air in your home clean and easy to breathe. If you notice that your vents are blowing lukewarm air during colder weather then you should check that your filters are clean, installed correctly, and the right size for your furnace unit.

You expect to receive a steady supply of warm air from your vents whenever the furnace turns on. But if your furnace comes on and the air coming from the ventilation system is only lukewarm, resulting in insufficient heating for your house, you should call for professional repairs right away.

Air leakage is perhaps one of the most common factors that cause lukewarm or cold air to be emitted. If the ductwork is damaged, air leaks through before it reaches your vents. Not only will you have to live in clammy temperatures, but you will also be spending a tidy sum on your monthly energy bill to make up for the loss of conditioned air.

Failure to change the air filter in a timely fashion can lead to the air filter becoming clogged and blocking some of the hot air from getting through to your home, which causes the lukewarm air. You also need to make sure that you didn't accidentally put the air filter in backwards during your last cleaning or replacement.

Why is my furnace blowing lukewarm air? The lukewarm air coming out of your furnace can also be the result of leaky air ducts. If your ducts are leaking (and ENERGY STAR says that almost all homes leak about 30% of the air in their ducts), cold outside air is making its way into your ductwork.

My furnace is blowing lukewarm air! What can I do to fix this?If you’re lucky, it is just a supersized fur-ball, or debris blocking the air flow.That’s not l...

Once you’ve restored the correct setting, your furnace should blow warm air. Change the air filter If your furnace overheats, it could end up blowing cold air. In such cases, a safety control device known as the limit switch will shut off the burners.

The reasoning here is simple: furnaces don’t pump out hot air nonstop. Warm air is sent through your ducts when the thermostat says it’s needed. When the air temperature reaches the setting you’ve chosen — let’s say 70 degrees — the furnace can take a break until the air drops below 70 again. But if you’ve set your fan to be “on” at all times, it’ll blow cold air during the furnace downtime.

Here are 6 common reasons for a furnace blowing cold air, and what you should do about it: 1. It’s Just Been Switched On – Any furnace will blow cold air when it starts up, since it takes time for hot air to travel through the system and into your home. Cold air trapped inside will need to be expelled before the hot air can take its place!

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