Earlier this year I suffered a blown head gasget I got the engine swapped but the heater matrix was full of gunk so I changed it for one I got off ebay *BIG MISTAKE* Turns out the cheap ebay ones dont fit (didnt see that coming) as a result when I took the car for a quick test run, one of the clips holding the plumbing onto the matrix had failed causing a massive coolant leak all over the passenger (sorry Jason) and the heater box. Ive since replaced the old matrix after a good clean out and the heaters now blow out warm air when the engine is warm as you would expect but only when Im moving! I cant control the heater at all, its always on warm but the illumination works on the controls however the lights that indicate what setting Im on do not. Ive replaced the heater control box above the stereo and the actual controls and also a little white box below the actual heater. The only thing left to change is the heater its self! Before I embark on taking the dash off again I wondered if anyone else has had the same problem and if changing the heater worked or if theres a much simpler fix. Another member I work with mentioned a switch or something on the top of the heater?