Heating fuses blowing

[Andymav]

Hi all

I have a problem with a fuse constantly blowing on the heating system.

It’s only been in the last few days… the zone valves are working fine and opening as normal and it only happens after about 10 mins of running for hot water or heating.

The pump is making a noise like there is air trapped inside it but when I bleed the screw nothing comes out and it also gets quite hot to touch.

There are no wires loose in the wiring centre or any signs of melting or otherwise, am I correct in assuming that the pump may be over heating.

 

[Deleted member 120897]

It does point towards the pump with the fuses blowing. If nothing, including water (a dribble) is coming out, then there’s an issue.

 

[Andymav]

It does point towards the pump with the fuses blowing. If nothing, including water (a dribble) is coming out, then there’s an issue.

When I bled the pump it was just water so obviously the pump is making a noise for another reason I guess

 

[ShaunCorbs]

Is the pump electrical connectors dry pump end ?

 

[Andymav]

Is the pump electrical connectors dry pump end ?

Hi, yes bone dry, no wet connections anywhere

 

[Deleted member 120897]

Might be water in the windings @ShaunCorbs?

 

[ShaunCorbs]

Or motor / windings going bad pulling more amps so fuse is going to blow etc

 

[Andymav]

Or motor / windings going bad pulling more amps so fuse is going to blow etc

On an interesting note I noticed a 13amp fuse in the spur so I changed it for a lower rating of 3 amps and it blew a lot quicker ..I’m almost certain it’s the pump again I have bled the pump and no air comes out

 

[heeleyc]

Chance are it is the pump, can you disconnect it electrically and wire it up via a lead to a 13 amp plug fused at 3 amp and run it to see if it stills blows the fuse?

 

[Andymav]

Chance are it is the pump, can you disconnect it electrically and wire it up via a lead to a 13 amp plug fused at 3 amp and run it to see if it stills blows the fuse?

Not yet I will be doing just that next….the pump does sound ropey so I think your right