C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

No heat from heater HELP

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Old Nov 29, 2001 | 01:33 AM
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Default No heat from heater HELP

i,M freezing below zero and only getting cold air from heater.Any ideas? not overheating but when i floor it temp will drop 10-15 degres then go right back to 200.thanks for any help. 1994 a-4 c-4
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Old Nov 29, 2001 | 02:14 AM
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Default Re: No heat from heater HELP (dan-t)

i,M freezing below zero and only getting cold air from heater.
If you are not the original owner and the heater core had gone out, someone might have looped it because of the cost of repair. Double check the inlet and outlet of the heater core and make sure there is in fact a line hooked up to them, and that the heater hoses have been routed correctly. I just responded to your other reply and now understand why you stated 'no heat' in that one. -Matt-
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Old Nov 29, 2001 | 02:27 AM
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Default Re: No heat from heater HELP (HighHopes85)

Hey matt thanks alot for quick response,just bought it out of chicago and drove it home had oil leak,idel adjuster bearing out now no heat.not a good start with the c-4.I thought it blew warm on the way home but could be wrong wasnt that cold there then been in shop for leak so hadnt drve it in the cold till now.where is the heater core at under hood that could be problem,hope not...may drive it off mountain if it is.ha ha....
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Old Nov 29, 2001 | 02:30 AM
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Default Re: No heat from heater HELP (dan-t)

matt my first posts and your 666 oh boy i'm in trouble now..ha ha..
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Old Nov 29, 2001 | 03:13 AM
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Default Re: No heat from heater HELP (dan-t)

matt my first posts and your 666 oh boy i'm in trouble now..ha ha..
You think that's bad :D
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Old Nov 29, 2001 | 03:17 AM
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Default Re: No heat from heater HELP (Glock'94)

nice ride curtis....you got bunch of posts.i was talking bout matts number of the beast 666 bad news..take care
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Old Nov 29, 2001 | 10:42 AM
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Default Re: No heat from heater HELP (dan-t)

I had the same problem with my 93 just a year ago. It turned out to be that the heater core was blocked by some gunk. All I had to do was back flush the system. You can do this from the passenger side of the car, with the hoses next to the firewall, that run into the heater core. You should refer to the service manual for the exact heater hoses. Good luck.

Eric
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Old Nov 29, 2001 | 12:46 PM
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Default Re: No heat from heater HELP (HOWSER)

thanks a million. will owners manual show hoses?
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Old Nov 29, 2001 | 10:55 PM
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Default Re: No heat from heater HELP (dan-t)

Make sure you have enough coolant in the system. Turn the heater on, warm the motor up so that the thermostat is open, (do this with the cap off so that you dont have to pop the cap when hot) rev the engine slightly (1500 rpm or so) and top off the coolant level. Also known as "Burping" the system.

Jim-K
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Old Nov 29, 2001 | 11:04 PM
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Default Re: No heat from heater HELP (dan-t)

I dont think Ive ever even turned on my heat, so Im probably of no help. Sorry.:D
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Old Nov 30, 2001 | 01:43 AM
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Default Re: No heat from heater HELP (JPLT1)

thanks jim tried that today no heat still. a shop told me on phone could be bad radiator cap.he said if not 15 psi in system wont push it through heater core. could that be it? guess ill try that then back flush as a member suggested.
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Old Dec 4, 2001 | 03:45 AM
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Default Re: No heat from heater HELP (dan-t)

fixed ..... heater core clogged,thanks for advise back flushed system. no more freezing :seeya
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Old Dec 4, 2001 | 11:16 AM
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Default Re: No heat from heater HELP (dan-t)

Way to go. I'm glad to hear you got the hot stuff!

Eric :D
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Old Dec 6, 2001 | 02:30 AM
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Default Re: No heat from heater HELP (HOWSER)

thanks for taking the time to post eric,you saved me a lot of time.....
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Old Dec 6, 2001 | 02:32 AM
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Default Re: No heat from heater HELP (dan-t)

fulton,mo i grew up in columbia,mo i visit mom there every couple months have to hook up next trip eric.
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Old Dec 6, 2001 | 04:17 PM
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Default Re: No heat from heater HELP (dan-t)

No kidding, great town. I currently live in JC but manage to find the night life up there across the river. Take care.

Eric
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Old Dec 7, 2001 | 03:29 AM
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Default Re: No heat from heater HELP (HOWSER)

jeff city means closer to the lake,cool. had my share of tickets in mo watch out.cops there love sports cars....
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