Heater problem

[FastMerc]

I thought I saw a thread about heater and ac issues,or maybe I didnt.But any ways My moms 2007 GM blows only heat and adjusting the temp there is no change just hot.Then I try turning the ac on and nothing but hot air.Any one have an issue like this? Sorry if there is a post I didnt find...

[fastblackmerc]

I thought I saw a thread about heater and ac issues,or maybe I didnt.But any ways My moms 2007 GM blows only heat and adjusting the temp there is no change just hot.Then I try turning the ac on and nothing but hot air.Any one have an issue like this? Sorry if there is a post I didnt find...

Does the hot air come out the vents, floor or just the defroster?

Could be a vacuum leak or blend door motor problem. Might need the EATC repaired.

[Blackened300a]

My crown vic used to do this, try the self test.
To enter the self-test, press the OFF and FLOOR buttons simultaneously and then press the AUTOMATIC button within two seconds. The display will show a pulse tracer going around the center of the display window. The test may run as long as 30 seconds. Record all DTCs displayed.
http://www.idmsvcs.com/2vmod/eatcswap/selftest.html

I used to have to do this test every year when I wanted to use the A/C. Once the test was complete it would work fine all summer.

[FastMerc]

Does the hot air come out the vents, floor or just the defroster?

Could be a vacuum leak or blend door motor problem. Might need the EATC repaired.
No it comes out vents,defrost and floor!

[FastMerc]

My crown vic used to do this, try the self test.
To enter the self-test, press the OFF and FLOOR buttons simultaneously and then press the AUTOMATIC button within two seconds. The display will show a pulse tracer going around the center of the display window. The test may run as long as 30 seconds. Record all DTCs displayed.
http://www.idmsvcs.com/2vmod/eatcswap/selftest.html

I used to have to do this test every year when I wanted to use the A/C. Once the test was complete it would work fine all summer.
Hey thanks I will try this tommorrow see what happens.

[ChiTownMaraud3r]

I currently have this problem on my Marauder, seems the blend door has failed with lack of use (how does that work :confused:) but have been too busy to worry about it.

Originally late last year it would only blow AC, the test showed blend door failure, and there was a loud clicking through the test. Somehow I exited the test before it was done by pressing something, and it kept the door stuck on heat. Now I will have to mess with it again if I want AC...:bigcry:

[FastMerc]

Going to play with this thing see what happens...

[FastMerc]

It seems to have worked, thanks Paul.

[hotford]

Blend door motor accuator more than likely.....dash has to be pulled or slid over it will be a pain if your not handy................

[FastMerc]

Blend door motor accuator more than likely.....dash has to be pulled or slid over it will be a pain if your not handy................
Yep that is what it was,seems to be working now cleared the code.

[teamrope]

Just tried the self test on Linda's DTR. No codes, but still blowing warm air and compressor isn't even trying to cycle. acts like the refrigerant has discharged.

[MercNasty]

Im currently having this problem too, i thought that it probably was the blend motor since i used to hear the loud clicking noise to. Im gonna try the test tho and see what happens.

[fastblackmerc]

Just tried the self test on Linda's DTR. No codes, but still blowing warm air and compressor isn't even trying to cycle. acts like the refrigerant has discharged.

Very possible. The receiver / dryer has a tendency to rust out.

[MercNasty]

I just did the test and the thing started clicking like crazy again and gave me 2 codes, 024 and 025 and going to see what these 2 codes are but the good thing is when i turned the car off and back on the AC was back working and blowing cold.

[MercNasty]

so code 024= blend door short and 025= blend door failure. What exactly do these codes mean, do i need to buy a new blend door? keep in mind the AC is currently back working fine after doing the test.

[1stMerc]

Very possible. The receiver / dryer has a tendency to rust out.

I may have that problem. Stopped by Walgreens yesterday and when i came out noticed this greenish colored liguid on the ground right front corner. Looked under car and it looked like it had come from there. Appears there may be a hole in the bottom. Haven't tried the ac yet. That would be a first for me.

[MOTOWN]

I may have that problem. Stopped by Walgreens yesterday and when i came out noticed this greenish colored liguid on the ground right front corner. Looked under car and it looked like it had come from there. Appears there may be a hole in the bottom. Haven't tried the ac yet. That would be a first for me.

Thats exactly what my a/c accumalator did! rusted from the bottom until all the freon leaked out.

[fastblackmerc]

so code 024= blend door short and 025= blend door failure. What exactly do these codes mean, do i need to buy a new blend door? keep in mind the AC is currently back working fine after doing the test.

Blend door motor is bad. Needs to be replaced.

[MercNasty]

FBM where is the best place to get a blend door motor? I believe big owl has one but he hasnt been online in a few weeks.

[vegasmarauder]

Since they are such a pain to change, I buy from Ford. They are about $75 list, but most dealers sell for less.

Now as for changing them, it's not too bad, but you will need two people to move the dash back off and on. The book gives the procedure to pull the dash completely out of the car, but you really just need to move it back about 18-24 inches to get to the actuator. Also helps to have a small handed person to remove/install the screws.

We just did one two weeks ago and now have it down to 2 hours start to finish...

[fastblackmerc]

FBM where is the best place to get a blend door motor? I believe big owl has one but he hasnt been online in a few weeks.

Buy new from the dealer. About $75.00.

It's not easy to replace. You want to do it one time.