I have no heat.. help!
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
I have no heat.. help!
ok.. I have no heat in the car.. the engine warms up just fine.. but no hot air out of the vents?!?! could the outside air door be stuck open or something?!?!? any ideas?
Drifting
Joined: Aug 2001
Posts: 1,823
Likes: 1
From: Arlington TN
Re: I have no heat.. help! (SunCr)
Same thing here last year. Just did an all day radiator flush. Then, worked great! Just be careful doing a flush.....easy with the water!!!!! (I almost learned it the hard way in using water around the Opti!!!)
But first, confirm you dont have a wet floorboard in the passenger side. That would rule out a leak in the heater core.
[Modified by BrentDev, 3:48 AM 12/12/2001]
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: I have no heat.. help! (BrentDev)
no leak on the passenger side... also, NO residue on the windshield.. I'm sure its not leaking.. is there a outside air trap door or an air redirect door that might be sticking open?
Melting Slicks
Joined: May 2001
Posts: 3,270
Likes: 26
From: Winchester VA
Cruise-In V Veteran
Re: I have no heat.. help! (BluByU)
I have seen this several times in the past couple weeks at work. To save the cost of a new heater core, we have been performing a backflush procedure. In essence, you use a quality flush kit with safe detergents and solvents and flush the core by running the water through in the opposite direction it's pumped during normal operation. It works fantastic, we use Justice Brothers, and it is good stuff. I will try to find the procedure and get it out here. It won't be specific to Corvette but heater cores are pretty much heater cores. The procedure is 9 pages and takes about 3 hrs but is well worth it. The search is on...
Racer
Joined: Nov 2001
Posts: 370
Likes: 0
From: st.louis missouri
Re: I have no heat.. help! (Ski2Tee)
had same problem last week someone recomended flush and it worked,20$ at local radiator shop took 15 minutes,have read on here about flap being stuck could be that too.id flush it can't hurt as long as opti stays dry,good luck
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: I have no heat.. help! (dan-t)
This summer I just had the whole system replaced... The radiator removed, hot tank dippied and routed, new waterpump hoses etc..etc... So It seems unlikely the core is plugged.... Where is this door i've heard about?!?!
Burning Brakes
Joined: Dec 2000
Posts: 1,161
Likes: 0
From: Orangeburg, NY
Re: I have no heat.. help! (BluByU)
I am assuming you have a 93. The temperature control door is located in the air control housing located on the passenger side of the car on the firewall. It is black with two silver lines going into it and two rubber hoses as well. On top of the unit is a control module with one wiring harness. If you remove the module (three bolts) you can see inside the air control housing. When you look inside you should see a core on one side and a flap(door) on the other. When you change temperatures from cold to hot the door should move. See if the door moves freely (bad) or is secure (good). If the door moves the control rod is broke, a 1.00 piece. If the door does not move it could be either a bad vacum connection, a bad control unit or a bad programmer unit. Chances are that you just have a bad vacum connection.
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Le Mans Master
Joined: Dec 2000
Posts: 7,839
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From: San Diego, Ca
Re: I have no heat.. help! (BluByU)
This summer I just had the whole system replaced... The radiator removed, hot tank dippied and routed, new waterpump hoses etc..etc... So It seems unlikely the core is plugged.... Where is this door i've heard about?!?!
