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
engine not warm, low coolant, or stuck thermostat
Isn't a heater supposed to blow warm air?
why does ac blow warm air? why does ac blow warm air?
It doesn't really blow it out it just warms the cold air.
Low on coolant. Stuck open thermostat. Poor circulation (plugged heater core).
dual control damper needs replaced how do you change it
Your heater will blow cold air only.
it has to heat up, just like water has to warm in the faucet.
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 coolant circulation from a plugged up heater core. Try flushing the heater core and replacing the thermostat.
It could be the thermostat on the engine. If the engine does not warm up adequately the heater will never blow hot air.
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.
The front expansion valve is clogged.
THE CAUSE for this is that when your cold air is on the petrol is used to create air. and that is how cars create cold air
it wont blow heat itll blow cold air
you are low on coolingliquid !
No, not if it's on a heat setting. Most home thermostats have a "Fan" setting that will blow cold air if the attic is cold.
Our car had this problem. Answer was a new A/C computer needed.
heater core possibly plugged and leaking
One of the reasons a 2000 Jeep Cherokee heater would randomly blow cold air and then hot air and then cold might be that there is a problem with the hot/cold duct. The air or a vent might be inadvertently blowing periodically.
The heater core is blocked, or a heater hose has collapsed, keeping hot engine coolant from getting to the core. The "blend air" door may be stuck in the open position, keeping warm air from circulating, and dumping in cold outside air. I am assuming that engine coolant and water pump is good.