Cause more, looking for manufacturers to sell it! Do not do it yourself!
Can not detect the flame signal, may be the ignition needle, the master problem
Can you add any other phenomena? The There are many reasons for this phenomenon. The Operation problems, it may be your temperature is set too low, a fire on the over-temperature, over-temperature after the flame and then automatically ignition. The The This can set the temperature first. If the problem is the wall furnace parts need to actually solve the actual problem ,,, these can be ridiculed pots Intuit stumbling to find a sale to see.
Check the gas is normal, and then look at the chimney, elegant switch is normal. Not a professional person, you can find the boiler manufacturers to solve
