Stove central heating - replacement pump advice please

[magpie patrick]

Following last week's post I've dug the pump out, and after a couple of other checks fastened it straight to a leisure battery. The battery is fairly old but fully charged and holding charge (evidence - I charged it in the office about six months ago and the AVO still says 12.64 volts). 

 

A spark as I connected the battery so clearly a circuit is being completed but nothing from the pump, zilch, nada. No whirring, no hum, no smoke, not a sausage. 

 

Photo of the pump below - replacement is £25 on the internet. Simple question, is it really up to the job, or should I invest in something with more oomph?

 

45 foot boat, two radiators. 

Edited January 19, 2019 by magpie patrick

[nicknorman]

I’ve got a couple of those pumps on our boat, one for the engine to CH radiators heat exchanger and one for the hot-air-over-steerer’s-feet blower. Both are about 4 years old, and still working fine, although they don’t get a lot of use (none in summer, obvs!).

 

How old is your pump? If it’s lasted a few years I suggest that at £25 it’s been reasonable value. And buy two, keep one as a spare!

 

Its a brushless motor so there will be some electronics inside that have gone duff.

Edited January 19, 2019 by nicknorman

[magpie patrick]

Thanks Nick,  exactly the response I was hoping for.

[ditchcrawler]

1 hour ago, magpie patrick said:

Thanks Nick,  exactly the response I was hoping for.

https://uk.banggood.com/DC-12V-Solar-Hot-Water-Circulation-Pump-Brushless-Motor-Water-Pump-p-1199886.html?gmcCountry=GB&currency=GBP&createTmp=1&utm_source=googleshopping&utm_medium=cpc_bgcs&utm_content=garman&utm_campaign=pla-gbg-tools-pc&cur_warehouse=CN

[Tony Brooks]

I expect the old one is brushless as well. If so t is easily a stepper motor and driver so that's two things that can jamb. The motor rotor or the impeller. I would connect it and apply some shocks to the body with something like a plastic or hide hammer. It might just work.