My audi heater core isn't getting hot at idle. After leaving the engine to idle for 15 minutes the heater core temperature sensor was only reading 25 degrees. I've got the feed from the engine going through the LPG vapouriser into the core and back out. Unfortunately it was so long ago that I can't remember whether the top or bottom pipe is the feed or return.
A few questions. Does it make a difference which side is the feed and which is return? Which is best?
Do you have the temperature sensor attached to the rubber pipe or somewhere else?
In addition I've got a leak from the pipe connections to the core. I have to keep going in and nipping the jubilee clips up every few months. What style of clips have you guys used? Whilst I'm on changing the clips I'm also wondering if it's worth replumbing it so the vapouriser is fed from the return rather than the feed?