Question 1

Toilet's holding tank is overfull

Accepted Answer

Possible cause: The tank has been filled beyond capacity. Leave the holding tank in place. Go to the outside access point, swing the pour-out spout round, place a suitable container underneath, carefully take off the spout cap, and let the tank drain down before replacing the cap and spout - keep the valve blade closed throughout.

Question 2

Bad odours from the toilet

Accepted Answer

Possible cause: Not enough (or the wrong) toilet fluid used. Use the holding-tank fluid at the dose printed on its own bottle.

Question 3

Toilet won't flush

Accepted Answer

Possible cause: The fresh water tank doesn't have enough in it. Make sure the fresh water tank isn't running low. If it's still not flushing after that, contact your caravan dealer.

Question 4

Toilet's valve blade can't be opened manually

Accepted Answer

Possible cause: Over-pressure in the holding tank - can happen if the tank's been left removed for a while, stopping the automatic vent from working. Open the access door and swing out the pour-out spout, then slowly remove the spout cap to release the pressure. Check whether the blade is stuck against the seal, and lubricate it if needed.

Question 5

Toilet's holding tank won't come out

Accepted Answer

Possible cause: The valve blade isn't fully closed, or the retaining clip is sticking. Check the valve blade is in the closed position, and that the retaining clip moves freely. Never force the tank in or out - this can seriously damage the toilet system.

Question 6

Major toilet unit malfunction

Accepted Answer

Contact your dealer.

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	Toilet's holding tank is overfull	The tank has been filled beyond capacity	Leave the holding tank in place. Go to the outside access point, swing the pour-out spout round, place a suitable container underneath, carefully take off the spout cap, and let the tank drain down before replacing the cap and spout - keep the valve blade closed throughout.	DIY Safe
`N/A`	Bad odours from the toilet	Not enough (or the wrong) toilet fluid used	Use the holding-tank fluid at the dose printed on its own bottle.	DIY Safe
`N/A`	Toilet won't flush	The fresh water tank doesn't have enough in it	Make sure the fresh water tank isn't running low. If it's still not flushing after that, contact your caravan dealer.	DIY Check / Tech Fallback
`N/A`	Toilet's valve blade can't be opened manually	Over-pressure in the holding tank - can happen if the tank's been left removed for a while, stopping the automatic vent from working	Open the access door and swing out the pour-out spout, then slowly remove the spout cap to release the pressure. Check whether the blade is stuck against the seal, and lubricate it if needed.	DIY Safe
`N/A`	Toilet's holding tank won't come out	The valve blade isn't fully closed, or the retaining clip is sticking	Check the valve blade is in the closed position, and that the retaining clip moves freely. Never force the tank in or out - this can seriously damage the toilet system.	DIY Safe
`N/A`	Major toilet unit malfunction	—	Contact your dealer.	Professional Intervention Required

Coachman Toilets & Sanitation

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Master Troubleshooting & Diagnostics Matrix