Seems silly, but you’d be surprised how often this has happened. Your furnace might be running just fine, but the air blowing out of your vents feels cold. However, not as many people have experienced a central heating system that doesn’t work. The … Thats using a meat thermometer!! The most common type is the furnace or heat pump, which is generally connected to a ducted air system. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. The first thing you have to do is check to see what type system you own. Problem: Heater is blowing cold air - Yahoo. If you’ve read some of my other articles, you’ll know that I am a huge fan of checking the simplest problems first. Another common problem for a heater blowing only cold air is that the pilot light might be out. Below are some reasons you may be getting a blast of chilly air and how you can warm up your house as soon 1as possible. Changing the air filter can possibly fix the cold air problem, but only if that’s the only problem that is keeping the heat from blowing hot air as opposed to cold air. 1) Test your heat pump’s supply and return air with a thermometer. Do you have cold air blowing out of vents when heat is on? Naturally, all heaters use a fan to blow air, but if your fan setting is set to ‘on’ throughout the day, it explains why the heater seems like it … While it's blowing cold air, the thermostat calls for heat, but the furnace will not respond, even if I put the temperature way up. | Richard, love your website!! The lukewarm air coming out of your furnace can also be the result of leaky air ducts. That cold air mixes with the warm air from your furnace, causing the air coming from your vents to feel considerably cooler than it should. 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. 7 common reasons a heat pump blows cold air BEFORE READING FURTHER: Watch this video on how a heat pump works. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Dazu gehört der Widerspruch gegen die Verarbeitung Ihrer Daten durch Partner für deren berechtigte Interessen. When the chilly weather finally arrives, and you have to turn on your furnace for the first time after many months of non-use, the last thing you want to find is that it’s not working. These are the most common culprits when it comes to electric heater troubleshooting if your heater is blowing cold air. This will lead to heat blowing out cold air. Furnace not working. Thanks!! Sie können Ihre Einstellungen jederzeit ändern. 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. Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. If your heat pump is blowing some cold air, there are a few things that may be going wrong. If it’s a particularly cold day or night, your heat pump might just be blowing air that’s cooler than your body temperature, making you think it’s cold. It will also have a back up electric heat coil, which would be activated as a second stage of heat when the outside air temperature drops below 35° F. The Heater is Too Big/Small – The heater’s size makes a difference to how well it works. The pilot light might simply just need to be re-lit, or the gas valve could have been shut off after last season’s use. Your heat pump might not actually be blowing “cold” air. 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