One Cold Vette
Thread Starter
Heel & Toe
Joined: Aug 2006
Posts: 16
Likes: 1
One Cold Vette
I'm not getting any heat in my corvette. I've checked my display and I know the thermostat is working as it opens around 210 and keeps the engine tempature at 190.
I've back flushed the core and touched the hoses when the engine is hot to ensure there is warmth there.
I've changed the Heater Control Flow Valve. Still I get no heat.
I've set the inside temperature to 80 and still no luck.
Any ideas or suggestions?
I've back flushed the core and touched the hoses when the engine is hot to ensure there is warmth there.
I've changed the Heater Control Flow Valve. Still I get no heat.
I've set the inside temperature to 80 and still no luck.
Any ideas or suggestions?
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
When the core is plugged, coolant flows over the top but not through it (think of what might happen if the flow stopped). If the core was readily accessible, you could verify it by putting your hand on the fins to see if they were nice and toasty. You can try compressed air, but system pressure is only 15 to 16 psi, so if you get too aggressive, you can put a nasty hole in it. Your real solution is to replace it.
with SunCr, sounds like something wrong with your heater core if everything else seems to be working right.
Drifting
Joined: Aug 2002
Posts: 1,775
Likes: 125
From: Birmingham AL
Does the hot/ cold door move? Pull the (I don't know what it is or what it's called thing on top of the heat/ac box under the hood) out and see if the door moves. The door can be seen if you remove this item with wires coming out of it on top of the heat/ac plenum under the hood. It looks like a heat sink when you pull it out. Then you can look down in the hole to see if the door moves when the heat is cycled on or off. Come back and let us know what you find.
I had an '89 coupe several years ago that had a non funtioning heat door due to some "cold" solder joints on the ac programmer board.
I had an '89 coupe several years ago that had a non funtioning heat door due to some "cold" solder joints on the ac programmer board.
Le Mans Master
Joined: Dec 2003
Posts: 5,768
Likes: 33
From: Van Steel Corvettes
St. Jude Donor '12-'13
Does the hot/ cold door move? Pull the (I don't know what it is or what it's called thing on top of the heat/ac box under the hood) out and see if the door moves. The door can be seen if you remove this item with wires coming out of it on top of the heat/ac plenum under the hood. It looks like a heat sink when you pull it out. Then you can look down in the hole to see if the door moves when the heat is cycled on or off.
