Question about 1986 Porsche 944

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After driving car for a while ,hot air is coming from dash , unable to select it off

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I have same problem. Sounds like your blower motor problem. I check my vacuum hoses and i no longer have the same issue. dont know if it will work for you but check the hose next to the battery to the middle of that area where the blower motor is located. good luck

Posted on Aug 30, 2010

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2008 ls460 air pocket causing gurgle sound in dash. Dealer unable to fix New radiator and hoses added to car

take it to a radiator shop and have it pressure purged
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So the AC is working, but when you select hot air, it doesn't work? Does cold air come out when you select hot air, or does no air come out? Please provide as many details as you can. What year is the car?

Perhaps the dial to select hot or cold air is not working. Does the dial feel the same as it always has, or has there been a change recently?

Is the engine warm when you try to select hot air? If the car hasn't been running a while you won't get hot air.

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not sure why you want to bypass it , this gismo moves damper under dash to allow wether you get cold or hot air out of vents depending on what you select on dash control (hi /low vents) if theres a problem with it most times it comes from ac condensate collection pan drain clogging up and water spills over into duct work rusting the damper shafts making it impossible for damper movers to move them , producing a fault or hot or freezing cold air all the time , sorry no easy fix for this but removing underdash ductwork and cleaning / replacing them lots of hours upside down with your feet on seats and head under dash , just kidding ...... most times we just take front seats out that makes plenty of room

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My 99 chevrolet monte carlo z34 heat is not that hot and air works for defrost but not dash vents?

check radiator fluid level it take hot radiator fluid to pass through the heater core to produce the heat in your car VIA the fan. also check or replace your thermostat it could be bad and stuck in an open position thus radiator fluid not getting hot, no hot fluid no hot air
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On most cars when you push a button or slide a lever to change your choice of location where you want the air to blow out louvers move inside the dash to redirect the air to your chosen location. When you switch from heat to AC other louvers move. These louvers are often powered by vacuum lines running from the engine. If one of these louvers is stuck or if you have a vacuum leak in one of the lines it may be causing your problem.

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Removing the dash is depending on your mechanical skills not that difficult. You have to disconnect the outside evaporator case from the firewall to gain acces to the heater case attaching nuts. I believe the only way to get the door is the complete heater case. If you are not comfortable removing a dash,have a professional do the job

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