Back boiler pump not starting up

Deedsie · 22-09-2022 1:49pm #1

Hi all,

We have the above plumbing set up in the hot press connected to a back boiler stove in the living room. Was all working perfectly when we stopped lighting the fire last April but when we lit the fire for the first time last week we noticed some of the rads were heating a little (smaller ones upstairs) and others were not heating at all. The hot water was also absolutely boiling.

There is power getting to the pump but it doesn't seem to be powering on at all when the heat in the pipes builds up.

Depending on where the thermostat on the pipe to the top right is set the display on the pump can switch on and off.

Is there anything I can do to get it going? I know I should just call a plumber but they are quite hard to get at the moment plus also kinda broke so if I can do it myself I would like to try. Any ideas?

Thanks

meercat · 22-09-2022 5:53pm

https://www.boards.ie/discussion/2058264451/back-boiler-pump-not-starting-up

A gentle tap with a hammer sometimes frees up the impeller.

phelixoflaherty · 23-09-2022 2:33pm

Or unscrew the large disc at the end of the motor, (a small amount of water might come out).

Then insert flat head screwdriver into the slot in the end of the shaft, now twist to free up the shaft

Deedsie · 23-09-2022 3:24pm

https://www.boards.ie/discussion/comment/119655856#Comment_119655856

The black plastic part at the front? Doesn't want to budge at the moment

phelixoflaherty · 23-09-2022 3:31pm

Apologies.

Didn't look at photos, older pumps had a screw at the back which one could remove and loosen seized shaft.

Deedsie · 23-09-2022 7:05pm

https://www.boards.ie/discussion/comment/119651955#Comment_119651955

Lit the fire this evening, waited until the pipe with the thermostat on it heated up. Placed some cardboard on the pump and started tapping away with the hammer. After about 20 seconds it kicked in. House is boiling now with the windows open but delighted I didn't have to call the plumber in.

Thanks a million for that suggestion. Really appreciated :-)

Back boiler pump not starting up

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