datsundrew
A2OC Donor
So this weekend I decided to try to sort out the heater on ORC, our tdi. I’ve post about this before and tried just about everything, and came to the conclusion there was a blockage in the heater matrix. Last winter we managed with the tepid heater, and my husband had a nightmare coming back to Heathrow airport late one frozen evening, where the screen kept freezing !!
having drained the system, I removed the webasto and identified the hose to the matrix, and the other hose to the back of the head. I tried blowing through the matrix and it was very difficult indeed. many attempts at blowing with an airline, filling the pipes with water and blowing through again saw blobs of white gunge and rusty particles, I probably repeated this 50 times blowing from alternate ends.
Eventually I could blow through it without the air line, so at this point I filled it with heating cleaner ( 1 bottle for up to 10 radiators, so I shot the lot in and left it overnight)
Sunday morning, and a flush through, and unexpectedly absolutely nothing untoward came out, so it’s either totally useless, or it’s clean?
The next step was to look at the webasto…..it’s never worked, and using VCDS there is also nothing there, no coms at all With the car.
I tried connecting a known working one, still nothing!
Having had these things apart a few times, I bought a manual + to pin 1 to switch on on eBay. These control boards were fitted to older units, and to ones used on boats etc. My plan was to build up the original unit from ORC, which is dead. Replace the board, check the glow plug and replace gaskets etc. I then set it up in the garage with a water tank, fuel, pump etc and connected it up……then a live feed to pin no1, and away it went!!
the water was soon up to 80 degrees where it slowed down to a quiet whirr. Fan bloody tastic!
having drained the system, I removed the webasto and identified the hose to the matrix, and the other hose to the back of the head. I tried blowing through the matrix and it was very difficult indeed. many attempts at blowing with an airline, filling the pipes with water and blowing through again saw blobs of white gunge and rusty particles, I probably repeated this 50 times blowing from alternate ends.
Eventually I could blow through it without the air line, so at this point I filled it with heating cleaner ( 1 bottle for up to 10 radiators, so I shot the lot in and left it overnight)
Sunday morning, and a flush through, and unexpectedly absolutely nothing untoward came out, so it’s either totally useless, or it’s clean?
The next step was to look at the webasto…..it’s never worked, and using VCDS there is also nothing there, no coms at all With the car.
I tried connecting a known working one, still nothing!
Having had these things apart a few times, I bought a manual + to pin 1 to switch on on eBay. These control boards were fitted to older units, and to ones used on boats etc. My plan was to build up the original unit from ORC, which is dead. Replace the board, check the glow plug and replace gaskets etc. I then set it up in the garage with a water tank, fuel, pump etc and connected it up……then a live feed to pin no1, and away it went!!
the water was soon up to 80 degrees where it slowed down to a quiet whirr. Fan bloody tastic!