Question about 2002 Dodge Caravan

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No more hot air

While driving home the ventilation system suddently went cold and i cannot get any hot air from the ventilation system although engine is hot

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It is full antifreeze .is the temp gauge at operaiting temp. if not put a t-stat in the car.

Posted on Jan 25, 2009

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Why my 06 suzuki reno blow air while idling but blow hot air when put in drive


is this a HVAC question heater and a/C?
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for 100 +years. now.

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2003 ford expedition i just got it a week ago and the front heat works great but the back vents only blow cold air. How do i fix this?


With the car parked and engine idling, turn the ventilation control between windshield defroster and "open air ducts" to front and rear vents. Listen to pinpoint where the valves are that open and closes the air ducts. It sounds like the air duct to rear vents are blocked, and the cold air in rear air duct is coming from "outside ventilation." The air vent to allow hot air to the rear vent is stuck in "open ventilation" mode, like when you're driving in spring or summer months.

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I was driving out 2003 thunderbird yesterday and about 5 minutes after I left home the overheat light came on and then the engine light. It started to run rough so I immediatley went home. The guage of...


u need to take somewhere and have codes scanned (most parts store do this for free) my best guess is it probably a bad coolant temp sensor (u have 2 of them one for gauge and one for computer) one that probably bad is one for computer (should be one with two wires)(one with one wire is for gauge) if temp sensor is reading that the motor hot it will adjust air/fuel ratio for a hot motor but if motor is actually cold it run bad
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1 Answer

A/C hot and cold air....


Technical Information: When the engine overheats (goes above 220 to 230 degrees), the ECM (Engine Contro Module) will disable the AC (won't let the compressor engage). This is a safety feature of the EMS (Engine Management System) to reduce potential damage to the engine from an overheat condition. Check your coolant level in the radiator & reseviore -- Low coolant level can produce the symptom you describe -- if low, top them off. Inspect your radiator hoses/cooling system for any signs of leakage (crusty deposits of dried coolant). Wherever you find this, that's where it's leaking. If you don't find any signs of leakage, replace the thermostat (& gasket if required (as a precaution) anyway. When the engine overheats, both cooling fans should come ON HIGH! If they aren't/don't, something's wrong and you need to find the cause. Every two to three years the cooling system should be flushed and inspected to ensure proper operation/condition and system protection. Overheating can seriously damage the engine. $$$$. An ounce of prevention is worth a pound of cure.

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Engine overheats when heater pipes connected


I think you could be right about there being air trapped in the system.
Or the heater core(radiator) is plugged.
Either way you need a pressurized radiator coolant pump to put the coolant in without air being trapped.
Although,i have seen it done by jacking the vehicle up high enough that the radiator was now higher than the heater core level, and then the coolant was put in.
But this is dangerous to try.

Jan 29, 2009 | 1999 Ford Escort

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