Ideal Response 120 combi - flashing LED and no heating

[bof]

On an Ideal Response 120 combi, does anyone know what a flashing
"Central Heating" LED (behind the cosmetic cover) means? The symptoms
are the boiler won't light if the CH is on though the pump pumps the CH
water OK and the DHW works.

MTIA

 

[Ed Sirett]

On an Ideal Response 120 combi, does anyone know what a flashing
"Central Heating" LED (behind the cosmetic cover) means? The symptoms
are the boiler won't light if the CH is on though the pump pumps the CH
water OK and the DHW works.

THE stock fault for this boiler is a leaking heat exchanger.
The usual presenting symptoms are that the boiler won't light because the
ignition is wet.

 

[bof]

THE stock fault for this boiler is a leaking heat exchanger.
The usual presenting symptoms are that the boiler won't light because the
ignition is wet.

Thanks for the reply. The boiler lights OK when it's DHW, and the CH
doesn't get hot even when the DHW is running. I'm sure the pump's OK as
when I switch off the DHW there's a couple of seconds surge of hot in
the CH.

 

[Ed Sirett]

Thanks for the reply. The boiler lights OK when it's DHW, and the CH
doesn't get hot even when the DHW is running. I'm sure the pump's OK as
when I switch off the DHW there's a couple of seconds surge of hot in
the CH.

Firstly I'm sorry if I put you on the wrong trail here. You may well have
a model that has not yet eaten its heat exchanger (yet).

I don't have a manual for this model - what does it say?


--

Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html

 

[Doctor Drivel]

Firstly I'm sorry if I put you on the wrong trail here. You may well have
a model that has not yet eaten its heat exchanger (yet).

I don't have a manual for this model - what does it say?

Check the pressure vessel charge. This goes flat quickly on these models.
Check the system pressure. It has a low pressure switch, so if pressure low
problems. I'm not sure if it also has a CH flow switch, if so check this.

 

[bof]

I don't have a manual for this model - what does it say?

I don't know, I haven't got a manual either.

 

[bof]

In message <[email protected]t>,

Check the pressure vessel charge. This goes flat quickly on these
models. Check the system pressure. It has a low pressure switch, so if
pressure low problems.

If the pressure's stable and, from prior experience, if the pressure
does drop it won't light the DHW either.

I'm not sure if it also has a CH flow switch, if so check this.

Thanks, the CH light flashes continuously, irrespective of whether the
CH/DHW/stat switch etc. are on or off, which seems to imply that there's
an internal fault of some kind before attempting to run the CH.

 

[Ed Sirett]

In message <[email protected]>,


If the pressure's stable and, from prior experience, if the pressure
does drop it won't light the DHW either.



Thanks, the CH light flashes continuously, irrespective of whether the
CH/DHW/stat switch etc. are on or off, which seems to imply that there's
an internal fault of some kind before attempting to run the CH.

There's a reset swtich somewhere IIRC.

 

[bof]

There's a reset swtich somewhere IIRC.

First thanks for all the suggestions. The cutout switch I know of is on
the bottom right, but if that pops out it shuts off the DHW and the CH.
This fault is something specific to the CH.