Why does a heater blow and not get warm?
Your problem is that your heater core is plugged up. If you do a back flush on the system, this should fix your problem. If it does not, you will need to replace your heater core. They(heater cores) do not always show leakage in the vehicle. Sometimes it will leak on the engine and evaporate(fluid). The heater core on your vehicle is being by-passed. Lol have someone check the heater coil - it's most likely bad Could be a lack of coolant circulation. Is your cooling system full? In reference to one of the previous answers, you would know if your heater core was bad because you'd have massive amounts of coolant leaking from your dash into the interior of your car. Check to see if your heater hoses are hot or not. You might have a coolant circution problem, in which case i would check the thermostat. In my jeep, the air wasn't warm, and I had a blend air door problem beneath the dash. Plugged heater CORE, check as mentioned above, low coolant, air pocket, themostat stuck. Poor circulation as mentioned.
What would cause the heater on a 1997 Grand Am Gt to not warm up completely and only blow slightly warm air?
What would cause a vehicle heater to blow warm air when blower on low but blow cold when blower turned up?
What would cause a 2003 Buick Century's heater to blow cold air when idleing but will blow warm air when moving?
Ihave a 1998 ford pickup it blow warm air from my heater I chang thwrmostat it still blows warm air?
Why would a 1989 Mercury Grand Marquis only blow warm air on the low speed setting and not on any of the other speeds?
Why would the heater in a '94 Ford Escort not get very warm could it be a direct problem of the thermostat?
Yes. If the thermostat is not staying closed long enough for the engine to warm up adequately, you will not get heated coolant into the heater core and the heater will not blow warm air. Change the thermostat for a 195 and you should get plenty of heat. It could also be as simple as not having enough coolant. worst case senerio would be a bad heater core.
Why does your 2001 Dodge Grand Caravan only blow cold air on the passenger side It will not blow warm air for the pasenger but does for the driver It does have a duel climate control?
Is there a fuse that could be blown preventing the heater from producing warm air in a 2005 Chevy Impala?
You have replaced the water pump thermostat and bled the system on your 2000 Chevy venture it still blows cold to luke warm air any ideas thanks?
If its a gas water heater then it may be a bad thermostat or the temperature is set very low or in some cases the wind from a storm could blow the pilot flame out and in time the water turns warm then cold. If its a electric water heater it could be that the bottom element is not working or the dip tube is damaged or the set water temperature is set on low.
Answer There could be several reasons why a car heater doesn't blow hot air and they are as follows. 1. The Thermostat is no longer functioning properly 2. Could be that the radiator is old and not enough anti freeze flows properly. 3. Water pump could be on the way out. 4. Maybe you are low on anti freeze 5. There is a thing called the heater core, if this heater core isn't working properly…