Air Conditioning and Coolant
Heater Cores and Blower Fans
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Why does a heater blow and not get warm?


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2011-11-08 18:37:59
2011-11-08 18:37:59

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Related Questions

if the heater does not blow out warm air change the setting.

heater on at idle and will not blow warm air. when moving it blows the warm air from the vents. what will cause this

It could be the thermostat on the engine. If the engine does not warm up adequately the heater will never blow hot air.

Heater core may be plugged . Flush the cooling system, also check thermostat.

Blocked heater core, faulty heater valve, disconnected connection to the heater valve.

Poor coolant circulation from a plugged up heater core. Try flushing the heater core and replacing the thermostat.

Assuming you want it to blow hot, it could be low on coolant, a stuck open thermostat, a plugged heater core or a faulty temp blend door.

engine not warm, low coolant, or stuck thermostat

Faulty thermostat. Plugged heater core. Temp blend door malfunction.

it's because of heat transfer into convection .

Any heater that only blows luke warm air isn't getting warm or hot water to the coil. This sounds like a problem with the thermostat not closing, and allowing the engine to heat the water properly for the heater.

heater will not blow on a 1996 ford contour

Low on coolant. Stuck open thermostat. Poor circulation (plugged heater core).

Probably need to add antifreeze. Check the Radiator not the overflow tank. If you are low on antifreeze it will not circulate through the heater core.

Check the following........... 1. A/C heater control doors. 2. A/C heater controller. 3. Trash in the heater box. 4. Partly clogged up heater core.

it has to heat up, just like water has to warm in the faucet.

The thermostat is not the issue. The thermostat regulates the engine temperature, but not the heater core temperature. There is a valve going to the heater core that is not closing all the way. It may be broken, clogged, or not actuating.

Your thermostat is most likely bad. It controls the flow of warm water into your heater core which warms your air. Its a common problem in winter and an easy fix.

Poor circulation probably due to a restricted (plugged up) heater core.

dual control damper needs replaced how do you change it

your heater core hoses could be plugged up and not letting much hot anti-freeze into the heater core then when you try to blow alot of air through it it cools the warm air off too much and you get not so warm air. try a cooling sytem flush

The heater does not blow air because it emits infrared rays that have heat molecules within them, thus releasing heat, not blowing it. A heater does not blow air becasue there is no moving air source within the heater. The heater emits infrered rays that cause heat to slowly flow out of the heater.

Sounds like your heater hose going to the heater core is stopped up some where along the way, Or your thermostat is broken. Otherwise if there is hot water getting to the core then it WILL blow warm air.

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