UK Heatrae Sadia Electromax boiler not powering up at all

[blacbabo]

Hi all,

The boiler, a Heatrae Sadia Electromax, is connected through a Timeguard timer. It's programmed to run between 20:30 and 22:30 every day and has been working fine until last night. I noticed there's no hot water coming out of the shower. Upon checking, the timer seems to be working fine. I can see the status changes on the display when the preset time is reached. However, the output LED did not light up, and the boiler is not powering up at all. Nothing is lit up on the boiler control panel. No power, no alarm, nothing.

Could someone give me some advice, please? It would be really appreciated.

 

[Avo Mk8]

If the Timeguard output green LED never lights up, have you checked the 13A fuse (with a meter), or tried a replacement fuse?
The timer and switch precede the fuse, which is on the output side of this device.

Otherwise you could try resetting it according to the instructions:

https://dam.epim.online/timeguard-19abbd57-b7f1-4088-baa7-bbe453c25a37/Product%20Instructions/Time/Immersion_General%20Purpose%20Timeswitches/FST24_FST77_instructions_135x85_issue_3_web_ready.pdf

 

[blacbabo]

If the Timeguard output green LED never lights up, have you checked the 13A fuse (with a meter), or tried a replacement fuse?
The timer and switch precede the fuse, which is on the output side of this device.

Otherwise you could try resetting it according to the instructions:

https://dam.epim.online/timeguard-19abbd57-b7f1-4088-baa7-bbe453c25a37/Product%20Instructions/Time/Immersion_General%20Purpose%20Timeswitches/FST24_FST77_instructions_135x85_issue_3_web_ready.pdf

Hi Avo,

Thanks for the reply. I tried resetting the timer a couple of times and even cutting the power, but no luck. I thought it might be a blown fuse, but I googled it and found out it’s probably not that since the timer still turns on. I think this is beyond what I can fix, so I guess I'll call an electrician.

Thanks again for your help

 

[Avo Mk8]

I thought it might be a blown fuse, but I googled it and found out it’s probably not that since the timer still turns on

I'm sorry I wasn't clear. The instructions for the Timeguard include a block diagram clearly showing that the 13A fuse is on the output of the unit, so the timer should continue to work (except the output light may not light) even when the fuse has blown (assuming their diagram is correct!).
I urge you to at least try another fuse! If I've misunderstood I apologise, but for the price of a fuse it might be worth a try.



Of course if the fuse has blown because of a new fault, you will need the electrician.

 

[blacbabo]

I'm sorry I wasn't clear. The instructions for the Timeguard include a block diagram clearly showing that the 13A fuse is on the output of the unit, so the timer should continue to work (except the output light may not light) even when the fuse has blown (assuming their diagram is correct!).
I urge you to at least try another fuse! If I've misunderstood I apologise, but for the price of a fuse it might be worth a try.

View attachment 117093

Of course if the fuse has blown because of a new fault, you will need the electrician.

Thanks for the clarification. I'll check the fuse before calling an electrician. By the way, do you happen to know how to access the fuse? The closest information I found online suggests inserting a screwdriver into the slot near the 'FUSE' label and gently turning it counterclockwise.

 

[DPG]

Thanks for the clarification. I'll check the fuse before calling an electrician. By the way, do you happen to know how to access the fuse? The closest information I found online suggests inserting a screwdriver into the slot near the 'FUSE' label and gently turning it counterclockwise.

Yes, switch off and then carefully use a screwdriver to prise the fuse holder out.

Might take a jiggle or two (technical term that)