98 riv climate control

the climate control on my 98 riv went completely out. checked the fuses  all ok....any ideas before I open the wallat? I'm thinking it may be a blower resister..please help.thank you

Blower control module will cause the blower fan to stop working, or work intermittently, but it should not cause the climate control to stop working, as in the control itself isn't operational. Something else must be up.

re hvac...would the blower control module disable heater / ac / front an rear defogger?

Bad blower control module will cause the blower fan to stop working, or work intermittently (affects AC/heat/vent).

AA...thanks for the info...

mdg642rf wrote:

the climate control on my 98 riv went completely out. checked the fuses  all ok....any ideas before I open the wallat? I'm thinking it may be a blower resister..please help.thank you

open the climate control and see if one or more of your ballast resistors failed.  It will be obvious once you get the control head unit opened, and if you are handy with electronics repair will be obvious too - just be sure to use better resistors.  Ceramics or wirewounds intended for RF applications should work fine, I got mine from Digi-Key.

If it happens to be the climate control head unit and you dont feel like fixing it i have a spare one i could ship out.

I don't have my service manual nearby - can someone tell me the location of the blower control module?

TIA

Mike, here's a few links if you're going to look into the climate control head unit:

Thread is about lighting but might help you if you take the CC head unit apart: https://rivperformance.editboard.com/t126-write-up-fixing-hvac-climate-control-lighting?highlight=HVAC

My personal experience with HVAC head unit issues. Though I found a solution at first, it was only temporary and the problems I described in the thread cropped back up again. I bought a used HVAC head unit, installed it and have had 0 issues since then, around a year ago: https://rivperformance.editboard.com/t9148-hvac-issues?highlight=HVAC

Let us know what happens - I know firsthand how much of a PITA issues like these are in the summer

Derek, here's the write up with some pics r.e. blower control module: https://rivperformance.editboard.com/t7381-write-up-blower-motor-control-module-replacement?highlight=blower

Passenger side close to the floor when plastic is off

ZEP wrote:

Derek, here's the write up with some pics r.e. blower control module: https://rivperformance.editboard.com/t7381-write-up-blower-motor-control-module-replacement?highlight=blower

Passenger side close to the floor when plastic is off

awesome thanks. I should have been more proactive about searching dammit!

Lol all good! Btw, it's a total (imo) PITA to get out just because even with my tiny little hands, it took an eon to unscrew the furthest screw... have fun!

I have this strange problem with my climate control. This winter the air compressor clutch will not kick on unless I disconnect the battery and reconnect it. Then it will work perfectly parked in the driveway. All the modes work. The temp is totally controllable. The fan is fine. The clutch turns on and off with the vent button. I played with all the switches at least a half hour. No issues whatsoever. But as soon I drive it about a mile or so I stop the car. If I turn the auto button off I can hear the clutch kick off. I hit the auto button again and clutch will not turn back on. All the buttons and temp controls still work. Then i cycle battery power and its fine again. So far I have cleaned the dust off the inside temp sensor. I took out the glovebox out and shook all the wires around. I cleaned the outside temp plug and the compressor plug. By the way I serviced up the refrigerant last summer and it was blowing ice cold in auto.

Yeah I think I'm a dumbass its working exactly like its supposed to. It's all about the computer shutting off the clutch control circuit around 40 degrees. I heated up ambient temperature sensor with wife's blow dryer it works fine.
It must have been cooling off when I drove it. The outside temp in Portland is 42 degrees.. But you would still think compressor would come on in defost no matter what to clear the windowshield.
.

I myself am not sure if mine works as it should. I never use it hahahaha.....

Ok no more dumb questions from me i just ordered up the service manuals on ebay. Think I'll wrap them up and throw them under the xmas tree. Ill tell my wife Santa must have stopped by.😁

doctorthor wrote:

Yeah I think I'm a dumbass its working exactly like its supposed to. It's all about the computer shutting off the clutch control circuit around 40 degrees.  I heated up ambient temperature sensor with wife's blow dryer it works fine.
It  must have been cooling off when I drove it. The outside temp in Portland is 42 degrees.. But you would still think compressor would come on in defost no matter what to clear the windowshield.
.

One of the adjustments I made when tuning my car was to lower that setting to 36. It never iced up on me, and I really wanted that compressor to help dry the windshield in some crappy weather. A/C compressor still original with over 250K miles on it, and I changed that setting about 150,000 miles ago...