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Vapor coming out of dash when air condition is on

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Posted on Aug 05, 2010


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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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Why is water comingboutvthe bottom of my triano air conditioning unit

air conditions work by removing water vapor from the air
that water is collected in a tray to be drained out
if the drain is blocked then that water will run out onto the floor

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"Vapor lock" is a condition that occurs when fuel becomes heated to the point of evaporation. If your vehicle is truly vapor locking, it means that something hot is coming in contact with your fuel line somewhere, overheating the gasoline to the point of it vaporizing. This is HIGHLY UNLIKELY. If you truly do have a vapor lock condition, find out where the fuel is becoming heated and fix that condition.
On a 1997 Jaguar XK8, it is FAR more likely that you have a bad fuel pressure regulator or a bad ICU.

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Water evaporation always refilling radiator also when air condition off a vapor comes through the vents

The coolant is not evaporating ,it is leaking from the heater core. The vapor out of your vents is coolant. You probley also have a residue on the inside of your windshield

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Sounds like you may have condensation in the vent channels. However, not sure how much of an issue it is.

If it were a heater core, you'd notice the coolant smell and fogging up of the windows ONLY when your heat is turned on, not cold air, because when you turn up the temperature, a door adjusts to direct air through the heater core and if it's leaking there, that's when the vapor comes.

So, with it being cold and having vapor, my question is now this: is it constant? Did you have it on heat and then switch it to cold? A temporary burst of vapor shouldn't be anything to worry about. Something more constant sounds like something that should be diagnosed by a tech.

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Several things can cause this but start by verify the choke pull off which is responsible for opening the choke plate after engine has started.It will recieve engine vaccum once started and open to allow air into the carb. This is a vacuum dash pot/pull-off externally mounted to the carb with a linkage arm to the choke plate.Without this opening,the engine will be starved for air and put you into a full rich condition. Another external device wchich can mysteriously cause rich conditions is the canister purge valve. It can introduce raw fuel and vapor on start up when failed.It is a black plastic valve near the carb with small and large vacuum tubes.

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