This heater arrived a week before it was due and was fitted the following day. On first inspection of what arrived, the package content (and there was lots of important bits and pieces) seemed complete, with the notable exception of a manual to fit it. This was not, initially, that important since I was replacing a Webasto heater and all the parts needed, such as fuel lines and mounting plates, were all installed already. However, later I discovered that I did in fact need the manual and the seller immediately supplied one by return e-mail.The actual installation was a relatively simple and uneventful task with everything just going where it was supposed to be and the heater was supplied with plenty of cabling to reach where it had to get to. The only real snag was the heater mounting bolts to the plate that holds it underneath. The new heater's mounting plate is much smaller than the old heater and since I had manage to leave my grinder at home, I had to be creative with a Dremel.On start up, the poor quality of the exhaust was exposed, not only was the pipe very thin, but due to the supplied worm drive clip (also rubbish) it did not correctly seal to the heater exhaust outlet and was damaged beyond use by the clip. Fortunately I was able to buy new clamps and an exhaust extension to fix the problem.On start up now the exhaust problem had gone and the heater ran very well, in fact it was so good I had to turn it off because it made the boat too warm, even with the doors and windows open!What had happened was the heater operated at full capacity and on reference to the manual I could not get to the part of the system that turned it down. I tried several times to get the heater to operate as it should culminating in the heater just producing thick clouds of smoke and refusing to do anything else. I contacted the supplier again and they offered a full refund at that point but since I had gone to all the trouble of installing it, I was not about to take it off again.The supplier, throughout this has been very helpful and constantly referred back to the manufacturers on many occasions, even at weekends, I have to say I have rarely received such commitment to service and product and it was really this that spurred both of us on to find the solution.The following weekend I decided to take the main fuse out, this reset the heater and once again it ran perfectly but with a noticeably noisy fuel pump. I was not concerned about the fuel pump and continued in my efforts to get the temperature down, The manual, which is worded in an interesting way, suggests that temperature control is effected when the heater is not running by reducing the fuel flow to the heater, the wording is "In a state of non-setting state" this does not work!It is only now, on reflection, do I realise that the phrase actually means "in operation"What does work is adjusting the oil flow when the heater is running and this is achieved by simply pressing the upward pointing triangle on t