Replaced radiator and boiler doesn't fire up

[Chris Moody]

Hi,

I use this forum a lot for advice but never posted. Hopefully somebody can give me some advice on what I may have done wrong.

I have an Ideal Isar HE24 boiler. Tonight I replaced a radiator, and I replaced the lockshield valve as it was dripping. To do this I had to turn the water off and drain the system, I did this through the pipe up to the radiator if that makes a difference.

When I then fitted the radiator and tightened it up I turned the water back on and heard it going into the radiator, I had no leaks so was happy. The next bit is where I think I may have caused a problem.

The next thing I did was turn the boiler on. I did this before adding water to the system to pressurise it which I think is a mistake, and the boiler now does not work.

When I turn the boiler on I just hear a click but it doesn't fire up, neither does the pump work, nothing happens.

This randomly happened one before without warning and through this forum I found it could be the PCB. I replaced the PCB and it worked. Could what I have done caused the PCB to blow again?

If you need any more info then let me know, any help would be much appreciated.

Thanks

 

[PrenticeBoyofDerry]

Have you now re-pressurized system and bleed all the air from each rad? And reset?

 

[Chris Moody]

Hi prentice boy,

Yes, I have filled the system, bled the air, and repeated so the pressure sits at 1 which is always high enough for the boiler to fire up.

I was hoping that would make it work but it still just clicks when I turn the power on with no other noise, it doesn't try to fire up.

I also need to mention the display broke a while ago so I can't see any lights on there.

 

[PrenticeBoyofDerry]

I believe the ISAR has reset button, have you tried that?
Have you tried drawing hot water off also?

 

[Chris Moody]

Yes I held that for 10 seconds.

After that didn't work I turned the mains electrics off and on at the fuse box just in case the reset butting didn't work and still nothing.

 

[PrenticeBoyofDerry]

As the display screen does not work, difficult to access situation. As now some fault finding and testing is required.

 

[Chris Moody]

Ok no problem.

From what I have done, ie fired the boiler up without pressurising the system, what are the options of what's gone wrong? Could it be the PCB? Is it worth me getting a second hand one and selling it again if it isn't that? Could it be anything else?

Thanks for your help

 

[St0rmer66]

It might just need a reset because you overheated it by firing with no water in the system. Not sure if you can reset though with a non-working display as the reset is sent through the display board.

 

[PrenticeBoyofDerry]

Ok no problem.

Could it be the PCB? Is it worth me getting a second hand one and selling it again if it isn't that?

It is worth a punt!

Could it be anything else?

Could be, but without a process of fault finding to eliminate, very difficult to say.