Hot water works fine but the central heating radiators stay cold, or vice versa
Boiler pressure gauge keeps dropping below 1 bar, needing regular repressurising
Drum stays dry, or machine hums/beeps but won't fill with water
Loud rhythmic banging noise from the machine during the spin cycle
Water pooling at the bottom of the door or dripping underneath during the wash
Washing machine finishes the cycle with water left in the drum and won't spin
Circuit breaker trips specifically when the electric shower is switched on
Weak, dribbling water flow from the shower head
Filter/grease indicator light stays on even after cleaning the filters
Rattling or vibrating noise from the cooker hood, especially at higher fan speeds