The winter has arrived here up north, and of course the Disco heater decided to act up. I can't really make heads or tails of the symptoms, though, and hope the forum have some ideas:
Mostly just cold air comes out of the vents, but from time to time a blast of heated air comes on for a minute or two. I've put the temperature control to "HI", which I believe to mean "output heated air no matter what the temperature is". No specific temperature give me much warm air anyway. The engine temp stays rock solid throughout. But still cold air for most of the time. What could cause this?
Other things that probably does not have any bearing on this, but I include them just in case: The fan is on the way out, and sometimes needs a small knock on the casing to start. Once started it keeps going, though. The Webasto fuel heater has given up the ghost, but as far as I can tell that should not impinge on the rest of the system. The lights for the lower HVAC control panel have gone out.
I've rented a heated space for Sunday to look into this. Mucking about outside in -21C does not appeal to me...