Yet another Denford triac at fault!

**Ade taplin** · 22-02-2018

Hi again the rs parts you have suggested are a lot newer than the ones in mine. I have the UNIVER E-0170 solenoids which are around £100 to replace. have you tried swapping the solenoids around as all 3 of mine are identical. I've tried to attach a jpg but struggling

**m_c** · 22-02-2018

And having looked at the datasheet, it could even be seals underneath the 4/2 valve leaking, as they mount onto a base which the hoses connect to.

I'd still start by swapping the pilot valves, and checking those seals. Then if the problem doesn't move, swap the valve bodies, and check the next layer of seals.

**jamesgates1000** · 23-02-2018

Swapped pilot valves, still same issue. Opened up the valve body and found a tiny square section o-ring that was creased, turned it upside down and now works. Can't seem to find a replacement seal set so will order a new valve body. Thanks for the help.

**m_c** · 23-02-2018

Sounds like a Quad ring, or x-ring, but by the time you find the right size, and somebody to supply them, a new valve body isn't that expensive. Plus the new valve should be guaranteed to work.