Sludged up sump where pump lives.
Lid off, right side off.(Or levered carefully to 45 degrees) Condenser out. Pump out, trap door under condenser off.
All will be revealed.
In a true Tim Downing shortcut way, the trap door can be accessed from the front once the condenser is out (easy once you see how it unclips) bit of kitchen roll to mop out the jelly, flush some water down to flush the stuff under the pump out and should be ok.
eastlmark wrote:In a true Tim Downing shortcut way, the trap door can be accessed from the front once the condenser is out (easy once you see how it unclips) bit of kitchen roll to mop out the jelly, flush some water down to flush the stuff under the pump out and should be ok.