Volvo Owners Club Forum - View Single Post - Cold air only+heated seat u/s passenger side.

dwaine dibbley · Jan 12th, 2016, 19:35

For the past few weeks my car, XC90, 2004, 51000miles which I have owned for nearly seven years, has only blown cold air out of the passenger side, drivers side is ok. And the heated seat has refused to work passenger side as well.
I have been trying to get to the bottom of the fault without resorting to main dealer help, primarily I'm being tight, the car is really getting too old to be paying £100 an hour labour.
There was power getting to the seat, but none coming out, I'd read on this and other Volvo forums that similar faults had been cured by replacing the seat module, I tried this, didn't work.
I also took the glove box out, and by moving the heater control arms manually that are attached to the stepper motor I could get hot air to come out of the passenger side, further investigation showed that the stepper motor wasn't even trying to move, so I thought I had found the cause of the no heat problem. Replaced the stepper motor, guess what? Still not working, Doh!
I should also mention that the only fault codes showing on my PPC reader were for the headlamp washer relay which I had taken out years ago, didn't like them squirting unnecessarily on a clean car. Then yesterday a fault code came up that hadn't before CCM DD00 Lin Bus1, and also CCM 0040 air quality sensor, I don't have VIDA, to be honest I'm not very good with laptops etc, I doubt I could work it.
I was lay awake last night thinking about this problem it was bugging me, and I remembered that a number of years ago I had changed the air quality sensor for one of the cheap Chinese branded VW ones that had been recommended on this forum, it has/had worked without fault until I saw this code yesterday, luckily I had kept the old faulty genuine Volvo one, so popped out the Chinese one and put the duff Volvo one in, cleared the fault codes and hey presto hot air passenger side and heated seats, result!
Not too sure what had been going on, still don't understand how the sensor affects the seat and air temp' on one side only, can only assume the cheap sensor has been creating all the problems with rogue signals.
Must recommend Simon at XC90 heaven in Warrington for good prices/quick service.
If anyone needs a stepper motor part No 30676510 or seat module part No 30710362 give me a shout, going cheap not needed now.
Just thought I would post this in case somebody is having similar problems to help them, after all it what these forums are for, to help/inform.

Jan 12th, 2016, 19:35	#1
dwaine dibbley Junior Member Last Online: Today 09:04 Join Date: Feb 2008 Location: warrington	Cold air only+heated seat u/s passenger side. For the past few weeks my car, XC90, 2004, 51000miles which I have owned for nearly seven years, has only blown cold air out of the passenger side, drivers side is ok. And the heated seat has refused to work passenger side as well. I have been trying to get to the bottom of the fault without resorting to main dealer help, primarily I'm being tight, the car is really getting too old to be paying £100 an hour labour. There was power getting to the seat, but none coming out, I'd read on this and other Volvo forums that similar faults had been cured by replacing the seat module, I tried this, didn't work. I also took the glove box out, and by moving the heater control arms manually that are attached to the stepper motor I could get hot air to come out of the passenger side, further investigation showed that the stepper motor wasn't even trying to move, so I thought I had found the cause of the no heat problem. Replaced the stepper motor, guess what? Still not working, Doh! I should also mention that the only fault codes showing on my PPC reader were for the headlamp washer relay which I had taken out years ago, didn't like them squirting unnecessarily on a clean car. Then yesterday a fault code came up that hadn't before CCM DD00 Lin Bus1, and also CCM 0040 air quality sensor, I don't have VIDA, to be honest I'm not very good with laptops etc, I doubt I could work it. I was lay awake last night thinking about this problem it was bugging me, and I remembered that a number of years ago I had changed the air quality sensor for one of the cheap Chinese branded VW ones that had been recommended on this forum, it has/had worked without fault until I saw this code yesterday, luckily I had kept the old faulty genuine Volvo one, so popped out the Chinese one and put the duff Volvo one in, cleared the fault codes and hey presto hot air passenger side and heated seats, result! Not too sure what had been going on, still don't understand how the sensor affects the seat and air temp' on one side only, can only assume the cheap sensor has been creating all the problems with rogue signals. Must recommend Simon at XC90 heaven in Warrington for good prices/quick service. If anyone needs a stepper motor part No 30676510 or seat module part No 30710362 give me a shout, going cheap not needed now. Just thought I would post this in case somebody is having similar problems to help them, after all it what these forums are for, to help/inform.