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Heater control diagram

Only cold air

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

blueextc3221
  • 15935 Answers

SOURCE: 1986 VW Golf heater blows cold air

The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.
if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

Posted on Jan 14, 2009

mrgreenz
  • 962 Answers

SOURCE: 1992 es 300 lexus heater is blowing cold

. Yes it could. some are vacuum powered, cable powered (mechanically) or electric powered. If the valve does not open. The hot water will not get to the heater core. It could also be the thermostat not opening.

Posted on Jan 20, 2009

  • 65 Answers

SOURCE: heater blowing cold air

Low fluid or bad therostat if it does it when engine is warmed up.Heater control valve replaced or mixing valve? If so you have a vacuum hose disconected

Posted on Oct 31, 2009

  • 192 Answers

SOURCE: the heater does not blow hot air just cold air all

The first thing to check is the coolant (antifreeze) level in your radiator. If this level is too low it could cause your heater not to blow hot air. Check this when the engine is cold by removing the radiator cap. Do not remove the radiator cap when the engine is hot. If you do, you run the risk of getting scalded by hot water and steam that can shoot out the top of the radiator. The radiator should be completely full. If it's not, fill it up with a 50/50 solution of antifreeze and water. Also make sure the radiator overflow tank is filled up to the full mark. This is usually about halfway up the tank.
If your coolant level is ok I suspect you may need to replace the thermostat. It may be sticking shut and not letting hot water get to your heater core, or it may be sticking open and preventing your engine from reaching its normal hot operating temperature. A thermostat is relatively inexpensive and usually easy to replace. Just make sure you follow the instructions and put it in facing the right direction. If the thermostat is ok then you may have a blockage in your heater core. Replacing a heater core can be a difficult job on some car. If this is your problem I recommend taking the car into a garage to have the repair done. I hope this helps you out.

Posted on Nov 16, 2009

wracefans24
  • 1985 Answers

SOURCE: heater / air stays cold when moving temp control.

possible blend air door stuck,or heater control assembly faulty

Posted on Dec 06, 2009

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