If one hose is the same temperature as the coolant and the other hose is cold, there may be a blockage in the heater core. After removing the blower, you may find that the squirrel cage is clogged with so much debris that the motor can't operate. Why Doesn't the 12v Socket in My Car Work? So why is blowing warm air inside the car? NOT A MEMBER? He also ghostwrites articles for numerous major trade publications. If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. A damaged thermostat may become stuck in the open or closed position. Find your nearest location. Can you adjust the speeds on the blower? Coolant level is good. It’s hard to enjoy the ride when your teeth are chattering! Alec. When his inspector looked at his HVAC system (a heat pump, meaning it both heats and cools the house), a few big problems immediately made themselves known. 9 comments: no April 13, 2012 at 7:43 PM. Any degree of blockage in the system can lead to the condenser not being able to execute its … WHY MY CAR HEATER DOES NOT BLOW HOT WARM AIR. If the coolant level is low, the vehicle likely isn't circulating enough antifreeze through the heater core and needs to be replenished. Is Pennzoil Good Oil? Check the coolant level. Here is what to check if your heater or defroster isn't working: Coolant/Air lock - Did you top off the coolant as described above? 301 3 3 gold badges 4 4 silver badges 12 12 bronze badges. Follow these steps to fix the problem. Have checked the fuse's and relay's nothing wrong there. The only way to determine which component has failed is to grab some basic diagnostic tools, access the blower motor, and check whether or not it receives power. At this point, the blower motor blows air across the it and the newly heated air blows on to the driver and passengers. its sludge build up and need to be flushed through heater core only. First thing to check is your coolant level. A car heater system is essential during the winter or early in the morning when you need to heat your car for that comfortable ambience to work. Login with Facebook. November 29, 2017 at 5:37 PM. Climate Control. Reply Delete. Reply 1: Good afternoon, Does it blow air at all? Luckily, swapping out a hot surface ignitor is easy. Yikes! Replies. Labels: car heater blows very less warm air, car heater not blowing proper hot, car heater problems, car over heating issue. Sun or Snow: Are All-Weather Tires Right for You? If the vehicle burns coolant, it may have a blown head gasket, which can be costly to fix. There are any number of reasons cold air or no air is coming through the vents. The safest way to do this is with a non-contact infrared thermometer. Heater not working 3 Answers. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. Other signs of a faulty heater core include a sweet-smelling scent in your car, windows that become particularly fogged-up, and puddles under the dashboard or on the passenger-side floorboard. The heater core looks (and works) similar to your car’s radiator — it’s made up of a series of narrow tubes and fins. Her expertise includes social media, web development, and graphic design. I agree to the user agreement. my ac,heater,defroster.andblower moter do not work. The coolant is housed in a translucent plastic jug in the engine compartment. Follow these steps to fix the problem. A blown fuse often indicates a different underlying problem, so never replace one with a larger fuse to prevent it from blowing out again. Many stores are open late and on weekends. Switch the thermostat from hot to cold and listen. Home Heater Blowing Cold Air? Check if the blower motor receives power. I flushed the heater core and know it's not plugged. If the blower doesn't receive power, check the blower fuse to make sure it's not blown. However, when the blower fan is not working correctly, you may notice little to no airflow coming from the vents. In December of 2015 (car was 4 years old) my heat stopped working well, and when the weather got colder I noticed that the heat was not blowing warm air on the passenger's side. A friend of ours bought a new house recently. Heater cores are typically situated directly in the back of dashboards. Unknown December 1, 2014 at 3:44 PM. If you determine that hot antifreeze flows through the heater core, there may be debris in the heater box. I have a vauxhall corsa, my heater on the car even when its been running for a while it never seems to blow out hot air, at best just a slightly warm air, ive changed the termostat over as i thought this was the problem but doesnt seem to of helped. Any ideas to what might be causing this, if so what parts will need to be replaced/repaired? 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