just had mine fitted same issue 5 lights spoke to propex guys & they said if intake black pipe is cut down then it won't work as it acts as a damper. so it turned out my mate cut it for me! we fixed it back to the 1m length and worked first time! job done
Nice one Ken, it really is quite straightforward if you site it somewhere sensible and don't cut the pipes
The thermostat has a switch mate click it left to turn on heat, in the middle for off and right for fan only.
Have you checked the tiny holes in the gas jets? they get blocked with carbon, give it a clean out and try it, no expert but iv had a dabble haha
thanks for trying to help but we sorted it a long way back just unpacking mine and wondered if there was on and off all problems were sorted further back read back if it helps i often reply with out reading back lol