Mysterious EATC Need HELP Fast!!!!!

[SHOMEUP]

The icon I selected is becuz it blows air full blast all the time- u can change it to cold but itll still blow real fast..Here's the thing when i turn it to floor at 72 degrees it automatically goes full blast no matter what the fan control is set to..Also, if i go to turn it off it blows even harder and wont turn off- but after about 20 min if will....somebody told me that it might be the fan control relay- that sounds pretty close to me what the problem is- I dont know if my a/c needs recharging or if its a bad head unit but my a/c doesnt work either- but when i turn it on to max a/c my rpms go up alittle so it sounds like my compressor is on- So basically all i need ot know is why is my fan blowing full all the time and i have no control over it...You will see more topics from me since i just bought a 91 sho due to someone that totalled my 94 sho and this 91 needs some work due to its old age ill get apic of it on here i only picked it up for 1500 bux so im pretty lucky..thanx guys if u can be of any assistance...

 

[sdpatt]

A failed blower control module located on the fan ducting below and behind the glovebox will cause this problem.


------------------
Scott

1991, 254K miles, glass hood, police grill, SVO shifter, Catz fogs,
K&N, 73mm MAF, Superchip, PP Y-pipe, Borla cat-back, 190 lph pump
Eibach/Tokico/polyurethane, Alum SFB, SS front/rear strut braces,
16x7.5" Moda R1, 225/55ZR16 Bridgestone RE730, -1 deg camber x 4,
6 disc CD, Class II hitch, Silver award at SHOklahoma Car Show

 

[SHOMEUP]

I was also wondering patt could this be the problem or a bad head unit- I just odnt really want to replace the module i fi dont have to or in this case the head unit either...but u think its the fan module right- how much do u think it will cost to replace it- i will do the labor myself of course and my dad works for FORD so i get it at a discount so its all cool..i should give him a call..thanx man we will see if it fixes the problem by chance does neone know the part number of it- if not no biggie..

 

[SHOMEUP]

BTW i forgot one thing is that part also called the blower resistor...i was reading in the manual and didnt see blower control module only blower resistor- i have the ***** haynes manual that doesnt tell u nething..newayz i just want to make sure i get the right part..

 

[SHOMEUP]

I just got a price quote form my dad- he said it is 127 dollars with discount that means it was around 200 for the part- i dont want to buy this part unless it really is the solution- how can i go about this finding out if infact this is the problem and will solve it...i hope im not the only one tlaking ot myself lol..j/k boys- side note here- i tried to hang with a brand new M3 today i hung with him on a turn at 70 mph but when we hit the highway i slowed down once i hit 130 and he still kept it floored i was ****** newayz this problem is driving me crazy i need this fixed soon..

 

[LIZARDKING]

I had the same problem. Blower control module. I got one from a j-yard for 25$. The nice thing about them is either they work or they dont. When I pulled mine it was pretty bad, the circut board was toast. Doesn't cost anything to pull it and look.