Hi,
My external Grant Combi vortex 26 oil boiler, possibly the world's most unreliable boiler, had another wobble couple days ago, no hot tap water, as the HW pump was silent, so gave it a tap on the speed selector dial and it whirred into life briefly. Took it apart, fiddled with metal wiper contact behind red dial and all good again......
I've had this happen previously on the CH pump last year, it seems the speed selector dial on these pumps falls to bits inside (plastic red dial that holds a metal contact wiper in place) and a bit of bodgery gets it working. Anyhoo, I wondered if it's possible to buy just the plastic electronic box that attaches to the pumps? (the red knob in pic below is what breaks)
I'd like to fix the bodge if possible but don't want to replace 2 pumps that work fine, other than for the lousy plastic dial that fails.
I'm an electronics engineer (but no plumber or boiler expert!) so am happy to do certain repairs on this troublesome beast.
My external Grant Combi vortex 26 oil boiler, possibly the world's most unreliable boiler, had another wobble couple days ago, no hot tap water, as the HW pump was silent, so gave it a tap on the speed selector dial and it whirred into life briefly. Took it apart, fiddled with metal wiper contact behind red dial and all good again......
I've had this happen previously on the CH pump last year, it seems the speed selector dial on these pumps falls to bits inside (plastic red dial that holds a metal contact wiper in place) and a bit of bodgery gets it working. Anyhoo, I wondered if it's possible to buy just the plastic electronic box that attaches to the pumps? (the red knob in pic below is what breaks)
I'd like to fix the bodge if possible but don't want to replace 2 pumps that work fine, other than for the lousy plastic dial that fails.
I'm an electronics engineer (but no plumber or boiler expert!) so am happy to do certain repairs on this troublesome beast.