Given that it is also getting colder here, and therefore only need the heater again for months. However, it is blowing cold air. I have already looked at whether there was a water flow from the outgoing side of the heater in the engine room. This was reasonable. However, with a warm engine, the output pipe is lukewarm. Not so hot as input. There is a T junction where the water also goes to the LPG evaporator. I only noticed a cold heater last year when the temperature dropped even further (have a large radiator too and no thermo clutch fan). So it seems to me in the manual switch (cable?) To sit behind the dashboard or that the heater is hidden. I wonder if you can easily get to this heater? Remove issue from the dashboard? Great thanks forward.