any ideas how to cure a noisy pump on heating system?

Question

runs system just sounds a noisy impeller

Answer 1

most pumps require oiling...when was it oiled last? also impeller may be rubbing because the cover is bent? or bearings shot because it was never oiled

Answer 2

The pump if not used over the summer can get clogged up with the black stuff that is generated in a heating system. It is silt like while the system is running but when dormant for a few months it can set quite firmly around moving parts. Take the pump out, there are 2 isolating valves to turn off the water. Replace it with a similar one or the same. If it is maroon in colour it is a Grundfos, If it is blue it is a myson. Others come in green. It is very easy to do as long as you have the grip size necessary to undo the connections.
Alternatively, isolate the pump as above and unscrew the body retaining screws around the head. Pull and the pump will come apart leaving the casting still in the pipework . Buy a new identical pump and replace only this part which is the motor and impeller.

Answer 3

Fairy liquid is magic to a noisy heating system lubricates pumps and stops the old cast iron boilers from kettling. I've known boilers so loud that one can't hear the telly and after an egg cup full in a radiator and 2 min. its been so quiet that the customer thought it had stopped working. Nowadays one can buy noise eliminator, it comes in a mastic type cartridge and is injected in an air vent on a radiator.

Answer 4

There might be some air trapped in the pump, there should be a screw head at top/side of pump, very large head that takes a large screwdriver or coin/disk, open this with the pump switched off, slowly, when you hear air come our followed by water then this should resolve problem, if no air only water you may have a bigger problem and have to replace pump

Answer 5

If the pump is only making a noise intermittantly is may be that the system needs flushing out but if it is noisy most of the time it proably needs replacing. Either way - it sounds expensive - sorry.

Answer 6

your pump probably needs replacing if it is more than about 5 years old , new pump is likely to be smaller than old unit for which you can get a "pump extender kit" better to call a plumber unless you are a diy freak as the system will need to be drained

once installed add "fernox" to the system this will keep the system clean and lubricated

pump with fitting should cost about £100.00

Answer 7

We had a clean boiler outfitted a short even as in the past and our plummer, who we've common for a lengthy even as, did flush our device with a cleanser even as the device replaced into drained because the device has been in position for roughly 30 years. He informed us that the purely thanks to do the interest impressive replaced into to take off all the radiators and flush them by to boot. besides the undeniable fact that the sludge that accumulates sits on the bottom of the radiator, i.e., gravity. We did not have all the radiators off (i might want to not face the upheaval) and our residing house keeps to communicate over with us because the boiler fires up and the pipes strengthen besides the undeniable fact that it type of feels that it the water pipes that make the noise because the noise keeps by the summer season even as the heating is off! desire you manage to kind yours out.

Answer 8

Before it hits thirty below zero and it's one in the morning you'd better do something about it now while you can. Remember the story of the grasshopper and the ant.

Answer 9

Call a plumber

Answer 10

buy a new pump befor it overheats and jams in place