Combi problem, no DHW

[grayfly]

I have an Ideal isar combi, about 2 years old, which just stopped delivering hot water. Boiler fires up then stops, if I keep water running it gets tepid then cold, tepid then cold etc.

I tried again with central heating on, but no luck.

There are no fault codes showing on the display panel.

Any thoughts?

 

[gas4you]

Does the ch actually work and the rads get hot properly?

What actually happens when you turn a hot tap on? Do you get the 'd' in the display? and when it stops what reading in the display do you get?

 

[grayfly]

The ch works for a while then stops heating, there is only a - in the display. DHW starts off hot and just goes cold after about 30 secs.

 

[gas4you]

- is a non described code that points to the pcb faulting

 

[grayfly]

Thanks.

Being looked at today, if the turn up!

 

[grayfly]

No one turned up, however I have the central heating working and the hot water appears to be working when the heating is on. I noticed that the pressure guage fitted on the pipe leaving the boiler is fluctuating between 0 and about 2 psi, is this the problem?

 

[gas4you]

It now sounds as though it could be the DV.

Do you mean that the boiler shows a 'd' when you turn on a hot tap?

 

[grayfly]

It still just shows a - when the hot tap is running. As stated above, its working with the CH on.

 

[gas4you]

I know its a big costly risk, but I still would go for a pcb fault.

Unfortunately its up to you, I'm not there

 

[grayfly]

Thanks for the input.