Glow-worm Ultracom 24hxi Heat Cycle Issue?

[hallra]

Hello Forum,

I've noticed at times that my boiler is heating in a very short cycle.

30 seconds on at full flame, heating to 65c.
30 seconds off, cooling to 37C.
30 seconds on at full flame, heating to 65c.

It cycles like this for 10mins or so, then goes quiet for a period of time, then repeats.
- During this cycling the boiler is whistling a bit when it gets close to 65c and there is a bit of a clunk when the heating stops.

At other times it is heating with less intensity, for longer time periods (3-5 min), with the flame stength going up and down.
- It then stops heating for a long period.


Is this typical boiler behaviour or is something not right?

 

[ShaunCorbs]

Doesn't sound normal depending on circumstance

Does it do this when the heatings cold

 

[hallra]

Hi Shaun,

Unfortunately, due to my health I rarely have the heating off.

In the past when the heating has been cold, I didn’t notice this short cycling.
- is short cycling the right terminology?.

I will try to find out during the week if we get a mild day.

 

[ShaunCorbs]

It's expected if it only does it when the heating system is hot because the return temp is coming back warm