Ideal isar

[stokecity]

Hi guys thanks in advance

had an intermittent fault on Isar traced it to board,put new board in and everything dead. Theres power to boiler, power going to board, fuse is good ( has continuity ) no power going to the boiler power switch?

Has it blown a new board? Or am I missing something

all cables have been checked and I've matched the pins on the back to the one I took off.

 

[Billy Bob Bob]

any display? display pcb maybe dead

 

[Ermintrude]

Are u sure there are two which are very similar?

 

[lame plumber]

display pcb lead and joints are prone to failure fm experience

 

[stokecity]

Hi guys

if it was display would the boiler still fire? As it won't.

 

[Ermintrude]

No display is on and off , is the connector block in properly on base of boiler.... Where cable comes in? Have u got 240 at the back of switch behind display?

 

[Billy Bob Bob]

Hi guys

if it was display would the boiler still fire? As it won't.

no it would be dead did display work before?

 

[lame plumber]

plug the display pcb directly into the main pcb to check cable function to save a bit of time

 

[stokecity]

No display is on and off , is the connector block in properly on base of boiler.... Where cable comes in? Have u got 240 at the back of switch behind display?

Triple checked all connections, no there is not 240v at the back of switch

 

[GrahamM]

Your jumpers all correct position?
These are nightmare for short circuits blowing boards. Must do short checks at all other components before fitting new board. Check for leaks at pump and div valve connections.
A shorted display board is also quite common as well as well as failing harnesses. Must check continuity through all.
I could go on.......

 

[mountainman]

Triple checked all connections, no there is not 240v at the back of switch

Check that the main plug underneath the boiler and behind the pcb has not been dislodged.

 

[arran197]

Connections in the wrong place on the board? I've done it before.

 

[Ermintrude]

Said it above there are two four pin squares that are like Barrymore.

 

[RoryD]

From what I read yo say no power across the switch. Did you check for continuity across it when switched on? link it. until that has power you'll be thrashing for ever and a day.