Thetford Flush Control PCB (SN) for C250 Toilet

This is Thetford's genuine SN-spec flush control circuit board for the C250 range of cassette toilets. It's effectively the electronic heart of the flushing system, taking the signal from the flush button and switching power to the water pump. If your C250's flush stops responding, runs continuously, or behaves erratically while the pump and switch themselves test fine, this control board is the most likely cause and is a direct swap-in replacement.

• Thetford part number: 50709
• Type: SN (standard) flush control circuit board
• Compatible toilets: Thetford C250S, C250CS, C250CWE, C260 cassette toilets
• Function: Controls flush pump activation from the flush button

• Q: What does the 'SN' version mean?
  A: SN refers to the standard/basic C250 control, typically used with a single flush button, as opposed to the CS or CW electronic variants which have different control boards.
• Q: My flush pump won't run, is this the fix?
  A: If the pump runs fine when tested directly but not via the flush button, this control board is the most common cause of failure.
• Q: Does this fit the C260 as well as the C250?
  A: Yes, this board is shared across the C250S, C250CS, C250CWE and C260 cassette toilets.
• Q: Do I need any tools to fit it?
  A: It's a straightforward swap for the existing board behind the toilet's control housing, a screwdriver is normally all that's needed, but disconnect power first.