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.
This is thoroughly answered here. Likewise, people ask, what do I do if my heater is blowing cold air?
When your furnace blows cold air, try turning the heating unit off and on. If the air feels warm for a moment or two, then switches to cold, it may be that the flame sensor is dirty. With a dirty flame sensor, your gas burner won’t stay lit, causing the air to go cold soon after the furnace turns on.
Secondly, why does my heat feel like cold air? You see, a heat pump heats your home by moving heat from the outdoor air into your home. But as it gets colder, and your heat pump can’t pull as much heat in from the outdoor air, the air coming from your vents drops slightly in temperature. If so, your heat pump is blowing warm air that just feels cold to you.
Similarly, why is my heater not blowing hot air in my house?
Thermostat is Set Too Low – Make sure the thermostat is set to a higher temperature than your home, and running on “heat” mode. If you’ve just changed the settings, wait for it to reset. If the furnace is still blowing cold air, check the thermostat batteries.
How do I reset my heater?
- Check to see that it is the pilot light that is out.
- Turn down the room thermostat to its lowest setting.
- Turn off the power to your furnace at the circuit breaker or fuse box.
How do I reset my thermostat?
- Shut Down Your AC at the Thermostat. The first step in resetting your AC thermostat is to turn it off at the AC unit.
- Find Your Circuit Breaker Box.
- Reset the Circuit Breaker for Your AC Unit.
- Wait 30 Seconds.
- Turn the AC Thermostat Back On.
Should fan be on auto or on?
The fan is located in the inside unit and helps distribute the conditioned air throughout your home. “Auto” means that the fan automatically works ONLY when the air is being heated or cooled. “On” means the fan is on 24/7, even when the air isn’t being heated or cooled.
What to do if your heat is not working?
Make sure your thermostat is set to heat mode. If your thermostat is battery-powered, try changing the batteries to see if it helps. Check that the circuit breaker is on and that the breaker for the furnace has not tripped. Be sure the furnace’s power switch is turned on.
What to check if your furnace isn’t working?
First, if your furnace has a pilot light, check to make sure it is lit. If this isn’t the problem, and your furnace does run on gas, check your water heater. If your water heater is working properly, you can eliminate gas supply as the problem. Next, check your air filter and verify it is clean.
Why did my electric heater stop working?
CAUSE: The most common cause for electric heater not working is blown fuses. If it is fuses or tripped, then what you can do is that you can replace the fuse or reset the circuit breakers if required. Now plug the appliance back in and switch it on. See if the problem has been resolved.