PFF - Pennock's Fiero Forum, PDA Edition

No Heat (air but never hot) (Page 1/6)

SoCalSimiFiero

APR 17, 01:27 AM

No Heat, (not that you need it much here in So Cal, maybe 7 days out of the year) '86
V6, comes to normal running temp as expected, the gauge has been verified to be correct.
FAN BLOWS AIR, at all speed.
When you switch between Vent, Heat, Defrost. You hear door servo move, you hear slap into
the new postion, and air comes out at all locations as expected.
BUT IT'S NEVER HOT, never even gets close to being warm.
Cooling system IS SEALED. IT DOES NOT LEAK WATER / COOLENT, No wet capeting under
the dash, no puddles on the ground when parked on slope nose down or rear down.

Solution requested. ( I want my heat back weather I use it or not, everything else works perfect
on the car)

3800superfast

APR 17, 01:32 AM

Hi, Try a new T-Stat...

Jncomutt

APR 17, 01:35 AM

The servo opening doors doesn't have anything to do with the heater flap. That is controlled by the slider. I wouldn't be surprised if the small tab that the cable attaches to (its only held on with washer looking thing, and if that didn't come off, the tab itself is prone to breaking), is broken.

I'd pull the HVAC assembly out and make sure you can manually move the heater flap back and forth. If that functions, Check to see that the heater hoses weren't looped by a previous owner or such. They may have just bypassed a leaky heater core.

Jax184

APR 17, 01:35 AM

There's actually no servos in the HVAC system so you know, it's all manually controlled via a few cables. If you think that's a bit too stone age, you've never owned a VW rabbit with a massivly complex climate control system, capable of dozzens of functions that all don't work.

Anyway, about the only thing that can let this happen (short of a cable breaking and a flap staying shut, which isnt the case if you hear it moving around) is that the heater core or one of the lines has become clogged. The lines under the car are metal and easy to crush shut if a previous mechanic didnt know Fieros. This happens all the time.

Also, I know my 'duke runs coolent through the intake before it goes to the heater core. I know the V6 has a coolent filled intake as well, and that it's commonly disconnected, but I don't know if that's related to the heater core system...

Edit: I didnt take into account the button push style HVAC controls, which I have little experiance with, when I mentioned servos.

[This message has been edited by Jax184 (edited 04-17-2006).]

PaulJK

APR 17, 04:18 AM

First thing I'd check is to see if the hoses going into the heater core are getting hot. When I bought my car, i was told it had no heat - went to check the heater hoses and found that someone had cut them and put in a piece of pipe, bypassing the heater core.

if the heater hoses are Not Hot, check the thermostat.

if the heater hoses are Hot, verify that the slider cable is moving the arm on the heater box that moves the door flap.

[This message has been edited by PaulJK (edited 04-17-2006).]

3800superfast

APR 17, 07:18 AM

Hi, Might want to flush out your system too, use Ogre`s method for burping the air out it, lift the rear end up about 18-25 inches when doing this .

SoCalSimiFiero

APR 17, 09:26 AM

The answer is.......... Thermostat. But I knew this before I placed this post.
Just another example of..... I don't really know, but I think I'll open my mouth and say this.
Some (most) of the user are so far of base on some problems, that it is a good thing I have
an education and know how to read a service manual.

Most of the time the best answers I get, come for one of my two other screen names.
wow, what a concept. I'm going to go drive my car to work now, now that I have heat.
It's one of those morning, 5 more to go.

luvin_my_fiero

APR 17, 10:36 AM

well, since you have such a great education, maybe you can see that different people are offering thier opinion. the thermostat would be everyones first guess but there could be other problems as well and these people are just offering other places to look to solve the problem. these people have taken the time to give a response and im sorry but your last post seemed to be "bashing" these people. if you dont value anyone elses opinion or input, then just keep to yourself. you kinda sound like a typical "left coast" person to me....but what do i know? i must not have that education that you have!!

------------------
Keith
Topsail Beach,NC
86&87 Fiero GT
86&96 Corvette
04 Harley Davidson Softail
73 Lotus Europa Twin Cam
86 Lotus Turbo Esprit

"He who dies with the most toys wins!!!"

3800superfast

APR 17, 11:18 AM

quote

Originally posted by SoCalSimiFiero:

People like you are idiots --plain & clear---**you knew the answer before you posted this**--did your Boy-friend help you with the service manual ? For someone with a education you don`t spell to well now do you---I remember you doing this same thing a while back --when a member posted about spinning his car out in the rain---... Maybe Cliff would be interested in knowing you have other screen names--which are against the rules & regs here--did your education allow you to read them? Can you read? Maybe one of your other screen names or multiple personality`s can do this for you
. Wow, what a concept. Are your other screen names kneel & bob or is that just what you do?
Your going to find your --self or selfs with a boat load of problems soon ...So read up , as you`ll get no more info here. Here`s a good place to start your reading:

http://www.amazon.com/gp/product/images/0671579592/ref=dp_image_text_0/103-8047560-4522264?%5Fencoding=UTF8&n=283155&s=books

avengador1

APR 17, 02:31 PM

quote

[SoCalSimiFiero] Most of the time the best answers I get, come for one of my two other screen names

You do know that Cliff frowns upon this practice, don't you?

[This message has been edited by avengador1 (edited 04-17-2006).]