Central heating not working & strange noise from pump

[eifion1967]

Just turned on the rads for the 1st time since March/April. Rads not heating and pump is making a strange noise, sounds 'dry' if that makes sense but only now and then, seems to run fine rest of the time but of course rads don't heat .

The pump is used for both the hot water and the heating, using valve, pump doesn't make a noise when just on hot water??

I sort of assume it's air but have bled all rads with pump running and they only had v small amount of air and bled pipe close to tank, again water came straight out, no air.

Any ideas, can't understand this?

Thanks.

 

[bengasman]

Bleed the pump

 

[kevplumb]

lock the valve mid pos first

View media item 667

 

[Dylan702]

if u unscrew the bleed screw on the pump ... put a screwdriver in and see if its actually spinning .. if not try turning the screwdriver to kickstart the pump , it may very well be stuck

 

[doitall]

if u unscrew the bleed screw on the pump ... put a screwdriver in and see if its actually spinning .. if not try turning the screwdriver to kickstart the pump , it may very well be stuck

Not if it's making a squealing sound

 

[kevplumb]

thats the hamster its not an electric pump

 

[Dylan702]

he didnt say there was a squealing sound ... strange noise he said .. ive heard pumps make a grinding noise then stopping

 

[Dylan702]

infact for the price of a new one id be inclined to replace it