Blend door or EATC?

[Devin]

My heat is either on all hot or all cold. If I have it anywhere off of 60 I can't tell a single bit of difference in heat output. If I move it to 60 then it blows cold. I can hear my blend door opening and closing once in a while by itself as well. Does that sound like a blend door or a EATC issue?

 

[30footSHO]

Here you go: self-test. Find out for yourself!

 

[projectSHO89]

You'll probably get an "02" code.

The blend door actuator in the cars is usually the problem.

Steve

 

[SolidState]

and they are a PITA. I swapped a perfectly good one out this year because I had to do the heater core...

 

[30footSHO]

and they are a PITA. I swapped a perfectly good one out this year because I had to do the heater core...

Thankfully, mine had already been replaced before I bought it.

 

[Devin]

Well, here's to hoping that it is the EATC. New gen 1 blend doors don't exist.

 

[SolidState]

for the 89? is it not the same as the 91-95? If so, I bought one last july...

 

[ras2433]

I had the same exact problem.
went to the junk yard and pulled one off a 94 (mine is a 92) installed it and presto no failure to the heat or the cold air.
All works fine.
Yes they are a pita.

 

[guse1096]

I have ran into blend door issues and i found it to be a cracked blend door. I second that theyre hard to find. Check into Lincoln Continentals, the early 90s had the same blend doors.

 

[Mad Celt]

I have an EATC for an '89 if you need one.

 

[Storm-Chaser]

Given what a pain it is to pull the dash, I'd change all three - A/C Evaporator, Blend Door Actuator, and Heater core [if you can afford to do all three at the same time !]

and they are a PITA. I swapped a perfectly good one out this year because I had to do the heater core...

 

[SolidState]

yes, I am kicking myself for not doing the evap core...