93 vette no heat. the lines are hot but no heat

kb0rqw
25

Asked by kb0rqw Dec 04, 2007 at 09:53 AM about the 1993 Chevrolet Corvette

Question type: Maintenance & Repair

is there some kind of switch behind the dash,to control a\c to heat.mine will not get hot.

2 Answers

littlehorn
32,275

Could be a partially obstructed heater core, or more likely a vaccum connection for the blend doors or the inside temp switch that keeps the vents from opening until it heats up, so as not to blow cold air on the driver. GM has used a system like this for many years. Often times the problem you are describing results when that sensor no longer detects the temp as it should.

2 out of 2 people think this is helpful.
aaacar
345

DID VETTE COME FROM A SOUTHERN STATE? IF IT DID, SUSPEST AN OBSTRUCTION IN THE HEATER CORE ITSELF.HAD AN ALLANTE FROM VERO BEACH,FLA.DIDN'T USE HEATER AT ALL AND PROBABLY NEVER FLUSHED SYSTEM,HAD TO DRIVE VEHICLE WITH HEATER ON HIGH ALL THE TIME TILL A CHUNCK OF DRYED UP ANTI-FREEZE FINALLY DIS LODGED IT MAY BE BETTER TO REPLACE HEATER CORE.

1 out of 1 people think this is helpful.

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