Honeywell 3 Way Motorised Valve.

[Jim Cooper]

Advice please.

I have a Honeywell 3 way valve 40003916 -003., which when CH & HW are demanded for at the same time, from the programmer, Only HW will kick in. Once the water has reached its required temperature, the Heating will come on.

Individually, CH & HW works O.K.

Can anyone offer any advice? Could it be a sticky valve ? or is it electric connections?

R
Jim

 

[Renewable M]

if memory serves they are hot water priority.

they electrically move to heating/both and spring back to HW

Does it work on individual channels?

 

[Bernie2]

Hi! Jim

Sounds obviously like its failing on mid position. Test valve motor and circuits.

If it was working what has changed to make it not work?

It should rest at A and leave hot water port B open.