Why is My Furnace Blowing Lukewarm Air?
Tori Klein • September 29, 2021
Is your heating system just blowing lukewarm air rather than hot air? Here are some factors that could be happening.
The thermostat is set to "on" as opposed to "auto".
When your thermostat is set to "on", the fan in your home heating as well as a/c system will run continuously-- also when your heating system isn't actually needing to heat the home. This can make the air coming out of the vents appear warm.
The repair: Set your thermostat to "auto" so it will just run when the heater is really heating.
You have a heat pump.
Do you in fact have a gas heater? Or is your heater an electrical heat pump? New heat pump owners commonly notice that the air from of the vents isn't as warm as when they had a gas furnace.
Heat pumps normally generate air that has to do with 90-100 ° F, whereas furnaces can produce air as high as 120-125 ° F.
The solution: Absolutely nothing. This is typical for heat pumps. As long as the thermostat is reaching the temperature you set it at, it's functioning fine.
There's a problem with your filter.
If the airflow to your heater is restricted, it can trigger your furnace burner to turn off while the blower keeps running. This will make the air just warm (or chilly).
Common filter issues that restrict airflow include:.
- Filthy air filters (Change it!).
- Setting up a filter that is also limiting (1 as well as 2-inch pleated filters are common wrongdoers).
- A filter that's mounted in reverse.
The fix: Change your air filter if it's time. As well as ensure it's installed correctly.
You have a high-efficiency, two-stage heating system.
High-efficiency, two-stage heaters are developed to run for longer time periods and also turn on and off less often. This makes them more reliable, comparable to the way your car is a lot more efficient breezing down the highway than in stop-and-go traffic. So when the heater remains in a lower phase of home heating, the air will not be as warm as a higher stage.
The repair: Nothing. This is normal. You can examine this by cranking your thermostat up a few more degrees to see if the air gets warmer.
Ducts are dripping.
The lukewarm air appearing in your heater can be the outcome of a leaky duct. If your air ducts are leaking, cool outside air is making its way into your ductwork. This can cause the air to really feel only lukewarm.
The repair: Duct sealing. Discover more about how to tell if you have dripping air ducts and how to fix them.
Gas supply problem.
If your heater isn't obtaining gas, or sufficient of it, the furnace may not be warming anything. Examine your gas supply. Was it turned off for any reason? Is there an issue with the gas company?
The repair: Make certain the gas shutoff to your home is switched on. You may need to call a professional if there's a gas issue inside the furnace itself.
Thermocouple or flame sensing unit issue.
If there's a problem with your thermocouple or flame sensor, it will not allow your heating system to spark the burners. Again, you can watch your heating system to see if it ignites appropriately. If the furnace does not light, maybe a dirty or poor thermocouple or flame sensing unit.
The repair: Call a specialist to figure out the problem and also fix it.
These are some of the most common reasons a furnace will blow warm air. However, there are several various other possible reasons. For the very best and most exact responses, work with an expert to detect the issue.
If your heater blows warm air, give us a call or schedule an appointment with us today.
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