sjc6765 Posted October 26, 2007 Share Posted October 26, 2007 I thought that my heat control valve was bad,, so I bypassed it. I got a 5/8ths ID elbow,, and totally bypassed the heat control valve. STILL no heat,, the heater core is not blocked, the hoses that go into and out of the heater core both get hot,, so if it was clogged, no water would be going through. Still, I have cold air blowing in the car,, It has got me stumped. Has Anybody gone through this before,, or have any ideas? Quote Link to comment Share on other sites More sharing options...
jzz30 Posted October 27, 2007 Share Posted October 27, 2007 it might be the motor or the controller for the fan vents inside the dash. Quote Link to comment Share on other sites More sharing options...
sjc6765 Posted October 27, 2007 Author Share Posted October 27, 2007 Do you have any instrucyions on how to check the motor,, or getting to it? Quote Link to comment Share on other sites More sharing options...
sjc6765 Posted October 27, 2007 Author Share Posted October 27, 2007 I just took the cover off at the passenger feet,, under that is the temp control motor and valve,,, I turned the temp from cold to hot and the motor and valve are working just like they should, moving nicely. I wanted to make sure that the heater core was not blocked,, so I disconnected it and ran water thruogh it,, no problems totally open. Is there another motor or valve that would have anything to do with this? Any Help? Quote Link to comment Share on other sites More sharing options...
HeidiRabbit Posted October 28, 2007 Share Posted October 28, 2007 I just took the cover off at the passenger feet,, under that is the temp control motor and valve,,, I turned the temp from cold to hot and the motor and valve are working just like they should, moving nicely. I wanted to make sure that the heater core was not blocked,, so I disconnected it and ran water thruogh it,, no problems totally open. Is there another motor or valve that would have anything to do with this? Any Help? I brought my '01 RX300 to the dealer today for no heat. Told the servo was bad; part of the AC system that controls air flow. They have to order it so my Lexy is in the shop until Tuesday but at least I have a brand new ES loaner. Car has 100,000+ on it so have to expect stuff to go bad. Quote Link to comment Share on other sites More sharing options...
Smartazz91 Posted November 9, 2007 Share Posted November 9, 2007 I've had the same issue with my 93 SC300 (260,000 miles). Turned out the coolant level was low. If everything else is working, it could be that simple Quote Link to comment Share on other sites More sharing options...
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