JAGUAR 23KW COMBI BOILER

Karen12 · 30 Dec 2007

Does anyone have an instruction manual for the above boiler? If so it woul be great if I could arrange to have a copy ( I have mislaid mine).

Also, there is currently a problem with my Jaguar boiler as it shows F3 fault. I have always manually switched on / off the heating (at Run position) rather than have the heating set. Now the digital display is slow to work and switching on does not cause the gas to ignite. Don't know whether this has something to do with the F3 problem or not?

Thank you

Agile · 31 Dec 2007

The slow to work display might indicate the PCB is faulty!

Nice little boilers!

Tony

Karen12 · 31 Dec 2007

Thank you Tony. If it is the PCB then does that suggest that there is nothing causing the F3 fault?

Is F3 something to do with a blockage? About a month ago the radiators were bled and I was wondering if this had caused gunge to flow into the boiler and therefore cause problems/ blockages?

Also, a couple of weeks ago the boiler stopped due to F1 fault which the Corgi man fixed by resetting the internal overheat switch. This happened again over Christmas and now the fault is F3.

I have been down this road before and spent a small fortune last summer replacing just about every part in the boiler. I really can't afford to do that again and so want to make sure that my Corgi man finds the fault straight away.

Thank you

stevejac · 31 Dec 2007

I seem to remember that the last jaguar i worked on with similar problem was the gas valve not shutting down properly and allowing gas to pass when not calling for heat thus overheat stat constantly going off.

jaguargenie · 3 Jan 2008

Open the bleed cap on the pump to release any air. See how it goes.

If the problem still persists, check the CHW temperature setting against where the reading gets to when the boiler fires up. Drop this down to say 55 degrees and see if the boiler still trips out and report back.

As an aside check if a sample of water drained out of the radiators is almost clear. That will usually give you an idea of the condition of the circulating water quality. If it is clear then drop a nail overnite in the sample you drained to check if there is any inhibitor in it.

alan stead · 9 Feb 2008

Did you manage to repair the F3 fault? I have the same fault
Thanks

Slugbabydotcom · 9 Feb 2008

F0 Loss of system water / pressure sensor failure

F1 No flame detected

F2 CH thermistor failure

F3 Boiler overheating

F4 DHW thermistor failure

The big question is why is your boiler overheating? Possible reasons are:-

Pump is knackered,
System is sludged up,
One or more valves is/are turned off on CH ... Flow or Return
Pump overrun not working
CH thermistor not sensing correct temperature for a reason not picked up as an F2 fault

Agile · 9 Feb 2008

As this boiler was cheap to buy they were usually fitted without cleaning the system.

I was stuck with a diverter valve repair last week on one and after fixing that I found the burner went off after 5-10 secs.

The honeywell APS had dirty contacts so as I was fixing on an agreed price I had to take it apart and clean it rather than fit a new one!

Tony

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JAGUAR 23KW COMBI BOILER

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