Question regarding Worcester 35 CDI II

[jgsmuzzy]

Hi,

I have the above boiler, and although it works, it has a fault. When the setting dial for the heating is set to full or 3/4, there is no problem. When it is set to 1/2 or below, the fan clicks on, the flame lights for perhaps 2 seconds, then the boiler shuts down for 5 seconds, then the cycle starts again and again and again with a lot of clicking from the relays. Not perfect, but as we are not without heating, not a huge problem. I was just wondering whether anyone knew why it would be acting like this? Pressure is between 1 and 1 1/2 bar.

Many thanks in advance.

James

Edited to add. Once whilst going through it's cycle, the boiler stopped completely, leaving just the power light on, the lcd display on, and the indicator light above the heating control flashing slowly. I reset the panel, and everything then fired up ok.

 

[jgsmuzzy]

bump

 

[Agile]

If I was examining your boiler with that problem I might well start by checking all the settings on the gas valve.

However that should only be done by a competent CORGI.

Tony

 

[jgsmuzzy]

Thanks Agile, I thought you might say that. Right, off to get the plumber in then.

Thanks again

 

[ChrisR]

Interesting. Does it light with bigger flames if you turn the knob up?
I didn't think they did.

 

[jgsmuzzy]

Eh? What am I missing here?

 

[namsag]

What ChrisR is saying is on initial light up no matter where your stat is set low or high the boiler lights on the same gas rate and then modulates up and down depending on demand