Question about Cars & Trucks
Open the hood and locate the 2 hoses from the engine that carry coolant to and from the heater box in your fire wall. Locate the valve in one of the hoses and have some one inside the vehicle with engine running turn the heater fan on and then go from warm to cold to warm and see if the valve moves from open to closed. The valve is probably stuck. You failed to mention year make and model these are important details in T/S
Posted on Dec 31, 2012
Lots of things could be "the problem". First, is the fan turning? Is the heater core on the passenger side under the dashboard getting hot? Are the heater hoses connecting to it BOTH getting hot? Is the on/off valve switch opening and closing as you slide it on the dashboard? If any one of these things are not happening you need to find out why!
Posted on Dec 31, 2012
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Posted on Jan 02, 2017
SOURCE: Heater doesn't blow hot air
First check the coolant level in the radiator. Check your heater core hoses on the firewall underneath the hood. Let the car come up to temp. and feel the two hoses. If only one of them is getting hot you may have bad heater core or a bad heater control valve.
Posted on Jan 05, 2009
check for hot water, check for power to blower, do a little work yourself before asking questions, if you can't do this then you really need help
Posted on Jan 15, 2009
will the air flow switch from floor to the mid to defrost? if so then we have a problem with the tempature door actuator. easy to replace just in tight place. Keep me posted for more help or if this was any help thanks
Posted on Jan 31, 2009
If your "Check Engine" or "Service Engine Soon" light is on, you need to have that checked out first.
If not, the next thing you should check is your engine coolant level. (Antifreeze) If the coolant level is low, the engine coolant does not circulate through the heater core and the the heater doesn't work. The coolant level could be low for a number of reasons including a leaky hose, water pump, or head gasket. In any case, if it is found to be low, you need to find out why.
If the coolant level is OK then the thermostat function needs to be checked to make sure that the engine is reaching operating temperature.
If all of the above checks out OK, then the heater control valve and/or the blend air door in the HVAC housing needs to be checked for proper operation. (NOTE: some cars are not equipped with a heater control valve)
Posted on Oct 10, 2009
Tips for a great answer:
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troubleshoot this types of problem,click the link below :---
Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html
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This will help.Thanks.
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