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1977 Pontiac Catalina heater problem The core is new, the radiator is new, the heater motor is new, but still no heat.

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Is the deverter valve opening to let hot water to flow through the heater core. this seams to be the most likely problem. unless the water inlet / outlet going to or from the heater core lines is stopped up.

Posted on Dec 29, 2010

Testimonial: "I will get back to you tomorrow. This is about the heating problem with the 77 Pontiac Catalina."

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  • ltbept Dec 31, 2010

    Thank you for your advice! The new deverter was ordered and installed last week and the heater core was installed (new) the day before. The deverter had to be sent (next day) UPS. The heater worked two days but now is blowing cold air again. I am extremely unhappy! El Paso, Texas has mechanics that keep customers going back and forth, because they never completely fix the problems. This is a trick to always have a garage with cars parked all over, so people think that the mechanic is real busy and must be good. Otherwise the mechanic would not have so much apparent business. BS!

  • Ron Lyda Dec 31, 2010

    I am Sorry the people at that place is Doing you that way. I want you to know we here at fix ya are not in no way the same.
    the only things left on your car is the vacuum lines of valve that moves the deverter valve. and on your dash there is a control it is the one that is red and blue you choose to be hot air or cold air. if in fact this is vacuum this controls whether the valve is open or closed. in some cases this is an electrical valve. it is easy to tell by looking at the valve. if it has a place for a small vacuum hose(s) to push up on it its vacuum. if it has a electrical plug its electric. keep in mind there can be wires to run the lamp that illuminates the back of it, when your lights are on. if you have a vacuum leak in your system as will. the Deverter valve might work part of the time. if you need any help please get back to us we would like to help you get this fixed.

  • ltbept Dec 31, 2010

    Thanks very much for the opinions on the heating problem with the 77 Pontiac Catalina. I will get back to you tomorrow,

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