Fault in the central heating system

[Nutrix]

Hi All,

I have a problem with the central heating, as soon as I put on CH and HW the fuse belongs to the central heating system gives fault. I think it is the three port valve but it could be the inmersion heating.
Could someone advise on this problem please?

Thanks

 

[stevetheplumber]

just done one like this inspect the insides of the threeway valve for water getting through the spindle it a new valve job if it is

 

[Bernie2]

The immersion heater should be on its own fuse not the central heatings. If it isn't I would get it looked at by an electrician quickly.

The central heating fuse could be a few things but as Steve says, check the 3 port valve for problems.

 

[RoryD]

Are you saying that the fuse blows? If so I would measure the resistance on all 3 speeds at the pump. something like 350 ohms, 250 ohms and 150 ohms. measure same across 3 port valve