bartsky

I just tried the heat on my 03 Z tonight and no warm or hot air at all coming out. Is there a fuse for the heater or relay??
Thanks...

johnson-rod

They are 27 and 18 in the passenger footwell. You should verify their location using the schematic in the fuse box cover.

dadaroo

More info would be nice. Like the HVAC unit controls and display seem to work and the blower works. If they do you don't have a fuse issue.

Pull your dash DTC codes and see if they show us anything.


Mr. Sam

pmr2000

My ac has been working but todays first attempt at heat is also coming out cold.


New to DIC's but only current showed HVAC 0441.


Kind of smells like heat is on but seems to be cold from defrost, vent, floors....no leaks that I can see.


Should I try the fuse 27 reset?

bartsky

I pulled both of my fuses, and cleared codes. Now i have heat coming out.

pmr2000

What's the other fuse besides 27? Should I just pull them, wait 60 seconds?

bartsky

27 and 18 as stated by Johnson. I actually just pulled to make sure not blown. I put right back in.

dadaroo

B0441 is the left actuator out of range. Do this first:

Re-Calibrating Actuators

Use the following steps to perform the calibration update:

1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module (fuse #27).

Important
The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.


3. Wait 60 seconds.
4. Install the fuse.



Mr. Sam

bartsky

Codes were p0361 and p0441 If I remember correctly. When I drove my car yesterday, I had not heat again. I cleared those codes, and got full heat. I am wondering if tapping the cream color wire on the HVAC plug for audio illumination is the culprit?

huesmann

Why did you tap the HVAC for audio?

dadaroo

Yeah, I missed that info. Why when you have GM accessory feeds for power in the foot well made just for that kind of thing?

I doubt that is the issue but if HVAC does not work with the radio illumination OFF it is not the issue.

I can post the info on the 3 foot well power feeds when I get home.


Mr. Sam

pmr2000

Yikes $600 actuators, I am lucky not too cold in the winter....glad my ac is functioning.


Do you need to pull the battery neg. also to reset or just the fuse?


I did the fuse for the 0441 no change.

bartsky

I have done countless audio installs in my Corvettes. You tap the cream colored HVAC wire for auto dimming on your head unit.

bartsky

I am aware of the three wire bundle in footwell. That is where I always get my head unit 12v switched.

johnson-rod

Actuators are about 75.00 each from Rock Auto. Same ones are 61.00 and 47.00 from Amazon. (47.00 is from some place in Texas).

Price is not the problem... pulling the dash is the problem. Even then, what is two days out of your life? Time spent working on your Corvette is not subtracted from your life span.

pmr2000

I just pulled part of the dash apart to swap wiper switch....that 14 year old plastic does not like to flex....and a 3 foot long wiper harness should of given me a hint would be a PITA.


Anyone have any good links to dash removal? I found one on another site but seemed inaccurate.


After the wiper switch and motor fiasco I am extremely discourage to do stereo aux or swap now, and my left window makes some crunching on the way down...

dadaroo

I recommend this for dash removal

http://tech.corvettecentral.com/2013...-dash-removal/


Mr. Sam