worcester 24i rsf (2 probs)

[B.O.B DOLE]

the first is once fired up it cuts out after 10 secs then the ignition starts to spark and does not light up also the fan stays on running

the second is if i fire it up this is on another boiler for dhw it is ok but if i turn the dial onto ch only there is no response from boiler at all

the pump is ok in each case

any ideas

 

[jiminblack]

No1...

Check for correct polarity, flame sense electrode and sensor lead. All ok? I would say PCB. (According to Ignition check page 31 of the manual).

No2

Something simple first. Check the CH dial hasn't actually snapped and is not turning the CH pot on the board...come across it a few times on these boilers.

 

[B.O.B DOLE]

No1...

Check for correct polarity, flame sense electrode and sensor lead. All ok? I would say PCB. (According to Ignition check page 31 of the manual).

No2

Something simple first. Check the CH dial hasn't actually snapped and is not turning the CH pot on the board...come across it a few times on these boilers.

thanks for your response i have checked the flame sensor and is ok
do you think the solenoid could do this closing donw the gas supply



on the second could it be the selector switch not changing over

 

[jiminblack]

Have you got the manual? If you have the fault finding section is good. It's all the Worcester engineers use to be honest. If you haven't got one I'll email you one.

 

[B.O.B DOLE]

Have you got the manual? If you have the fault finding section is good. It's all the Worcester engineers use to be honest. If you haven't got one I'll email you one.

got one thanks

 

[jiminblack]

No 1 Fault....Check the voltage for live output on X5 pins 1 and 2 relative to neutral on Pin 3. If no voltage PCB. If there is good voltage and no gas pressure at input to burner then Gas valve.

 

[B.O.B DOLE]

No 1 Fault....Check the voltage for live output on X5 pins 1 and 2 relative to neutral on Pin 3. If no voltage PCB. If there is good voltage and no gas pressure at input to burner then Gas valve.

it turned out to be reversed polarity to q1

 

[jiminblack]

Glad it's sorted mate. It's amazing how many times we come across reverse polarity!