Quote:
Originally Posted by jpnovak
pull the hoses that connect the SSIs to the heater valve. Look inside the heater valve and make sure the valve actually closes with the lever down. If it does not close then loosen the cable catch and close valve. Then tighten the cable.
You may find that the heater valve is sticking and the return spring is not strong enough to get it to close. IN this case, you can disassemble and clean them or just replace so that they work properly.
Its a very simple system. lever moves cable. Cable opens valve so heat goes into cabin.
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this .. but be VERY careful if you are replacing those heater boxes, they are on studs out of the body and nuts go on the end, you do not want to break a stud, spray and soak liberally.