93 850 climate control stopped working no indicator lights,

rig · Post by **rig** » 09 Oct 2006, 11:24

Problems with 93 850 climate controls: no indicator lights at all, blower runs at high speed and will not shut off. not sure what is wrong but it started smoking and blower started running at high speed can,t find anything burned got new climate control and no change help

Post by **billofdurham** » 09 Oct 2006, 12:41

Possibly the fan resistor has died. It controls speeds 1 - 3. Have you checked fuse 31? It covers speeds 1 - 3.

Max speed is controlled by a relay via fuse 5.

Bill.

rig · Post by **rig** » 09 Oct 2006, 13:21

all fuses are good i'll look into the fan resistor, but would that keep the ac and rec control switch and idicators lights from working also thanks i'll look into it

Post by **Ozark Lee** » 09 Oct 2006, 14:15

Is your climate control automatic or manual? If it is a manual, I can't come up with anything that would cause the system to behave that way besides a short in the wiring harness.

...Lee

rig · Post by **rig** » 09 Oct 2006, 19:36

climate control is automatic and i'm still lookin for a cause of the problem

Post by **MadeInJapan** » 09 Oct 2006, 20:35

I agree with a short in the wiring or the relay has shorted. The relay is behind and to the left of the glove compartment.

Post by **Ozark Lee** » 10 Oct 2006, 14:23

>>climate control is automatic and i'm still lookin for a cause of the problem<<

Have you tried to pull any codes? The automatic climate control posts codes which can be read from Socket B, Position 1. I have the manual variety myself. The last vehicle I had with the automatic system had a default system failure mode that turned the heat on full, the blower on high, and the vents to defrost. Thank God it was winter when it failed.

Best of luck,

...Lee

CarVolvo · Post by **CarVolvo** » 13 Oct 2006, 18:35

Problems with 93 850 climate controls: no indicator lights at all, blower runs at high speed and will not shut off

Are you referring to the light on the climate control box? A/c on or recycle? or....

Does this mean your not getting the code 1-1-1? or are you getting no codes at all?

I know when my automatic climate control went.. the OBD system just had a light on.. no blinking.

If thats the problem...then it might mean you should replace the box

rig · Post by **rig** » 13 Oct 2006, 19:31

i'm leaning towards a short but have not found it yet . the rec and the ac lights are not lit meaning can't read any codes but will try the B 1. i did find another box and tried it but same results blower running on high and nothing else works. still looking

JMartin · Post by **JMartin** » 15 Oct 2006, 10:02

To Ozark Lee:
Sounds like you replaced your Auto-ECC with a manual one..Did you buy it new or from a salvage yard? Any modifications required or does it plug right in? Any regrets about not going back with an Auto-ECC?