No heat to heater

Asked by GuruYWKL4 Feb 26, 2018 at 11:16 PM about the 1994 Chevrolet Suburban K1500 4WD

Question type: Maintenance & Repair

My heater went out. I replaced the thermostat with
first a 180% and then a 195 degree thermostat.  
Still no heat from heater. I am wondering if heater
control vavle in it has gone bad cause the heater
blows out just cold. Also whether it is electronic or
vacuum operated and its location please

1 Answer
103,455

KenF answered 6 years ago

Look along the heater hose to the core, you would see an actuated valve along it if it has a heater control valve. Any parts store could look up your vehicle and tell you what type it was. You should also check the problem isn't caused by a bad blend door or actuator.

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