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ck the two hoses after engine is warmed up.Both should be hot if control valve is working. If valve is working remove hoses at heater core very carefull and use garten hose and go from one to the other until water is clear hook up and try again
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Why is your car heater blowing out cold air when it is on?
Low coolant and a clogged heater core are possibilities.
What if you have antifreeze but car still produces no heat?
Bad or clogged heater core. Backflush it.
2000 Toyota MR2 heater will not get warm?
You may have a clogged heater core, or a leak in the system somewhere. Take your car to a mechanic who can replace the heater core or diagnose the leak.
New heater core still not working 93 car still not heating up?
Could have a clogged line feeding the heater core. Disconnect return hoses from the heater core and verify coolant is flowing through the core.
Why does your heater blow only cold air?
Your car could be low on antifreeze or your heater core could be clogged. With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!
Why your heater in 98 Lincoln town car only blow cold air?
Could be the Climate Control Unit or Clogged heater core.
Car heater and defrost only blow cold air?
Thermostat stuck open, if older car possibly clogged heater core- when run at oper temp the hoses going into/out of heater core be sure one is very hot - start with thermostat $$$ cheap & easier than a heater core problem!
Why would a car heater be blowing cold air?
AnswerBad thermostat, clogged heater core, or a defective heater control switch. If an engine has not been running long it will not have warmed up, the warmth from a car heater usually comes from the engine.
Why is your car heater blowing cold air 2008 jeep 4 d?
Check for a thermostat that is stuck open. Also can be a clogged heater core, or defective heater temperture control valve.
Can a heater core going out on a car make it burn more gas?
No it will not. It will either be leaking or become clogged which will make the heater not produce any heat. it has nothing to do with fuel mileage.
If Heater core is bad on a 1984 Mazda GLC will car overheat?
Not necessarily. It depends on what you mean by a bad heater core. The core will either be leaking or stopped up. If it is leaking, then it can cause the engine to overheat and the only fix is to replace it. A clogged or plugged heater core can sometimes be fixed by flushing it. You can also temporarily bypass the heater core until you can get it fixed. Just connect the inlet & outlet heater hoses together.
Why is your car defrosting on the inside and coolant leaking on the passenger side?
the heater core, heater core hoses or heater control valve is leaking
