Thetford Control Panel for C403L Cassette Toilet

This is the front control panel assembly for Thetford's C403L cassette toilet, housing the bowl fill/flush button and the LED tank-level indicators that show how full the waste cassette is. It's the part to replace when buttons stop responding, indicator lights fail or the panel housing has cracked, and it's supplied complete with a new valve blade handle so the flush blade mechanism can be reassembled with fresh hardware at the same time.

• Component: Toilet control panel assembly
• Manufacturer part number: 51812 (also listed as 5181262)
• Suits: Thetford C403L cassette toilets
• Includes: control panel, valve blade handle

• Q: Does this include the handle for opening the flush blade?
  A: Yes, a new valve blade handle is included along with the control panel itself.
• Q: Will this fit a C403R model too?
  A: This part is specifically listed for the C403L; if you have a C403R, check with us first as some C403 variants use mirrored or different panel assemblies.
• Q: My tank-level lights don't work but the flush still functions, is it the panel or the sensor?
  A: It could be either the panel's LED circuit or the tank-level sensor in the cassette; if the flush button and blade still work normally, checking the sensor/wiring first before replacing the panel can save the job.
• Q: Is fitting a simple DIY job?
  A: Yes, the panel is designed to unclip from the toilet housing and reconnect via the existing wiring plug, without needing to remove the toilet from the floor.