Munchkin boiler error code f09

This one is all so common to Munchkin boilers. It occurs after three failure attempts to light it.

It signals that there is a flame detection problem.

This can happen because of the following things:

  1. There is no gas in the system;
  2. The inlet and outlet pressure at the gas valve are not balanced properly;
  3. The flame rod is damaged or dirty;
  4. The unit is contaminated due to improper care;
  5. Check the duct system and make sure it is not blocked;
  6. Check the condensate line and clear it, if necessary.

If you do not have experience with such boilers, use professional help instead of trying to fix it yourself.