Quote:
Originally Posted by gregp1962
ROLLGUY, what do you mean when you say remove the lower section of the cartridge? I'm trying to block it open since it appears that coolant isn't flowing at higher speeds even though it isn't energized. I don't even have the electrical connection hooked up now.
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That's a prime example of why you keep being told to replace the cartridge. It's bad. For under $40 you can have a properly functioning heater again. If it's been replaced with the MTC aftermarket part, well, there's your problem...
In the meantime (or if $40 literally breaks your bank - in which case you need a cheaper car to drive) remove the existing cartridge and literally pull the pieces off the end of the plunger in the monovalve. You lose the filter screen, so hope your coolant has been kept serviced. With the valve parts removed, you have full heat, full time. Your new temperature regulator is your windows.