Heater control slider broken, need heat for winter
Something broke inside the heater control on the dash, slider doesn't catch anything to make the heater core turn on anymore. My mechanic told me that I could possibly bypass that control and just set it to full on for the winter, by changing a switch(?) under the dash near the fuse box or in the motor near the heater core. I'm looking for a pic or diagram that could show me what to look for and how to set it to full on. thanks
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Re: Heater control slider broken, need heat for winter
Try this: Go out to the vehicle, and open the hood. In the center of the engine compartment, mounted to the firewall, is the heater valve. You can't miss it, it has two hoses and a cable connected to it. If the slider on the dash is doing nothing, the cable may be off of the valve arm, slip it back on & retry it.... If the cable is not off, detach it from the arm, & move it in & out of the cable housing; the heat control on the dash should move. If it does not move, the cable is bad.
What you can do: Just move the arm that the cable connects to on the heater valve the other direction, to to allow the hot water pass thru the valve, and into the heater core.
You can run it like this all winter.
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If both heater hoses are getting hot then you know the coolant has to be flowing and the core should be hot.
What you will have to do is locate the blend air door servo.
The blend air door is a door (or flap) between the heater core and the A/C evaporator (even without a/c there is still a door to control the cabin temp)
Early vehicles with the slider controls used a cable but the later vehicles with a rotary knob or digital buttons use a servo to rotate the door mechanism.
The servos can go bad and the switches as well.
But from the sounds of it, your door is not moving to allow the heat through the vents.
Put an small brass butterfly valve in the heater line, on both sides. That will turn it off for the summer, and you can turn it on for winter. Alternatively, you could try and do like I'm doing on my '59 Chevy, when I get it out of the flood plain, and route ice water through the heater core.
will try to help. is your radiator full and has been winterized? as far as,has it had antifreeze put into radiator? low coolant in radiator is#1 problem for no heat. you've replaced the thermostat, so that's new. good thing. no leaks?is the heater fan blowing? when you turn the heat up,do you hear something in the dash moving? or do you feel resistance in the slider[the red zone] when turning the heater on,on the dash? if not, the acuator,or heater control valve on the dash may be bad. if the heater fan;s not coming on, are you sure you checked all fuses?even the one's under the hood in the black box? hope this helps and thank you for choosing fixya.com if you need further assistance,please repost your question and an expert will be happy to assist!
do you have the car at running temperature,if you do check the temp of one heater hose to the other if they are not the same the heater core is plugging up.if they are the same that is the heat you should be getting inside
the valve that control the heat is run by a cable from your heater assembly is located out under the hood,follow the two heater hoses to the fire wall,you will see one hose has a valve in it,one position lets water flow,the other doesn't.
maybe you won't need to. On the fire wall you will see 2 hoses an inlet and an outlet.that go directly into the heater core. Sometimes the heater core is clogged. disconnect the hoses and use a water hose running at only a moderate flow. put it into one of the the inlet of the heater core and run water until you see clear coolant. Then do it on the outlet and run it until the coolant is clear. you are trying to remove any clogs the heater may have. if this does not work, check the heater control valve.move the temperature slider the one to control the temp inside the car. and see if you can hear anything move. Check to see what type it is it can be a vacuum controled vavle, or a cable hooked on to the valve or an electronic controled valve. if it is a vacuum controled valve, you can check to see if a vacuume hose is disconnected, if it is a cable type valve,check it by moving the temperature control inside the car open it and close it with your fingers if you can see it. But most likely it may be the heater core thats clogged.