Glow Worm 30 CXI F13

[kb76]

Got called out yesterday to this one, asked over the phone if there was a fault code and F13 was showing, She said previous engineer had been out twice and pulled connections on the board, puts back together works for a short while but locks out with the F13 again. Picked up a new board on way through as its Saturday and P Centre closing in 30 mins. Get there, disconnect the wiring harness to board and gently air spray, plug back in and fires up. Put through its paces for 10 mins then F13. Check all wiring harness and looms and the only thing that looks a bit iffy is plug J1, plastic a bit brittle but contacts look fine.
Decide to open the new board a fit, then shows F10 (faulty return thermistor), reset boiler and then F9 (water pressure sensor) WTF!
Disconnect board again, inspect plugs and wiring with pic I took of the old board, switch on and fires up? Test for 10 mins and working fine? As mentioned plug J1 looked a bit tired and F9 F10 fault codes all enter and leave this plug. I know there are 2 types of board for these and the like for like board I fitted with no need for alterations. Expecting a call back on this one tomorrow, any ideas gents?

 

[dave1]

Had something similar before turned out to be the flow switch. Best call Glowworm from site and go through technical.

 

[kb76]

Cheers Dave, one thing I did notice occasionally on power up the pressure would show 0.0 initially then either F9 or F10. Water pressure sensor, this is also wired through J1?

 

[dave1]

Is it the original pink water pressure sensor, defo worth changing that first!

 

[kb76]

I would have thought so, boiler approx 10 years old. She didn't mentioned its had much work since new.

 

[Rabbitman]

Possibly to late to help, only one version of PCB available as a spare part the original board was an iris and then replaced by symsi, f13 usually relates to the PCB so if you've replaced it check the plugs on the LHS are fitted correctly as it's possible to get them the wrong way round or i think it's the middle one will fit in two positions, also check the DHW flow sensor the original grey one will also cause F13....... But double check the connections first it's once had me pulling my hair out for two hours lol

 

[kb76]

Cheers Rabbitman, yes its the Symsi board I replaced with another Symsi so possibly had a board change at some point if the original was the iris? double checked and checked again I had all plugs back where they started. As mentioned it was running fine when I left so fingers crossed I don't get the dreaded call back tomorrow with the same fault? Strange how the other fault codes-F19 and F10 come back to the same plug?