the most common problem with this heater is the pilot tip becomes blocked which gives the impression of faulty thermo couple,they also have an high limit stat which can be faulty and need changing .these problems should be undertaken by a gas safe engineer.
paul kaye
October 2010
main medway şohbenim var . diyafram contası delik bu parçayı nasıl temin edebilirim?
erturk narin
January 2010
Replace the Thermocouple. This is a small metalic tube the Pilot heats up usualy found in the burning flame.. There are other things but this is the most likely providing you have a good pilot light when you press the button and relite it (ie a blue flame about an inch long). Keep the button pressed for a count of half a minuite and slowly release. If all is well it should stay alight.
john
May 2008
had same problem....if the pilot light is yellow then the jet is partly blocked by debris, needs to be cleaned out by a gas fitter, should only take 15mins max.
alemild
May 2008
Not a job for yourself, but before changing the thermocouple, check to see if the pilot is blocked, i.e. burning yellow or missing the tip of the t/couple.