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Mend 30 boiler fire flashing
2

Worcester 30 Cadillac combi boiler won’t fire up and the EA?

my worcester 30 cdi combi combi boiler wont fire up and ''ea'' keeps flashing? my worcester 30 cdi combi bo... [Read more]
Mend Heating, Home Heating Systems
1

Greenstar 24Ri boiler, fast flashing - can I reset?

Greenstar 24Ri boiler won't light and the blue light is fast flashing. From the manual I can see that the iss... [Read more]
Mend Heating, Home Heating Systems
1

Oil fired boiler thermostat?

I have a Velaire 110/135 oil fired domestic boiler. I think the boiler thermostat may be faulty. The manual sa... [Read more]
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Mend 31

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We have 110 questions about mending '31' in category Heating, Home Heating Systems

How to mend 31

Pages 54321
Mend Heating, Home Heating Systems

my ferolli optimax hc 31 c boiler flashing a1?

my boiler is flashing a1 on screen pressure was high on 2 drained the valve to lower pressure now gone to 0 tu... [Read more]
Mend boiler working fine work
3

Ferroli HE 31 C Problem?

I have new boiler (less than 2 months old) that was working fine, but now DHW won't work. Fault d1 comes up on... [Read more]
Mend e stopped working
1

My ferolli optimax boiler H E 31 suddenly stopped working?

my water pressure continually drops so i turn it back up and it works again, but this time it won't come back ... [Read more]
Mend heating central code

how do i restore heating from ferroli optimax he 31 c?

the boiler is on as i have hot water but the central heating will not come on. the code is not recognised in t... [Read more]
Mend optimax c boiler
3

Name of part for Ferroli Optimax HE 31 C boiler?

Hi, I have the above boiler which requires a new part. In the user manual under section 2.7 'Condensate Outle... [Read more]
Mend Heating, Home Heating Systems

optmax he 31 c?

timimg for central heating i have set it for the mon to frid and sat and sun but some how also have set it for... [Read more]
Mend boiler hot temp
2

Unica HE boiler - hot water temp?

the hot water flow through the boiler is only warm to hot. The green led shows 31 - 36 when the bath is run et... [Read more]
Mend ferroli optimax he boiler
9

F40 on ferroli optimax he 31 boiler?

I'm in a rented property with prepaid gas meter. My gas supply ran out and I found a error code A01 in my Ferr... [Read more]
Mend water ferroli optimax
2

Boiler Systems?

How do I improve a low water pressure fault on a Ferroli Optimax HE 31 C Combi Boiler System? The pressure... [Read more]
Mend boiler low heating
18

Ferroli Optimax HE 31 C, how do I put water pressure up?

Boiler is 4 weeks old and the water pressure is too low and I now have no heating. Does anyone have any idea ... [Read more]
Mend serial number find
2

Ferroli Optimax HE 31 c boiler serial number?

Where can i find the serial number to my Ferroli Optimax HE 31C boiler? Thanks.
Mend water digital boiler

Ferroli Optimax he 31 s - water temp?

the digital tempreture on the boiler won't let me go above 65 fo water temp. Is this right?
Mend optimax ferroli 31
5

on a optimax ferroli 31 he c what is a F21 fault, ?

on an ferroli optimax he 31 c, what is a F21 fault please
Mend optimax 31 boiler

Help fix Optimax HE 31 C Boiler. F37 Error?

Optimax HE 31 C Boiler. F37 Error. There are 2 blue valves and 2 black. Which ones should I open and which pos... [Read more]
Mend ferroli gas pressure
2

How to fix fault affecting Ferroli Optimax HE 31 gas boiler?

The F fault indicator signifying low pressure and failure on my Ferroli gas boiler Optimax HE 31C hasnow been ... [Read more]
Mend optimax hello boiler

ferroli optimax he 31 c?

hello, silly question - how on earth do i fill my boiler to increase pressure? i have tried turning the blu... [Read more]
Mend ferroli optimax he 31 c
2

ferroli optimax he 31 c?

I have no instruction booklet for the above. It is 6 months old. The central heating wont turn off (even with ... [Read more]
Mend hot tap water

New Optimax HE 31 C ,turn hot tap on ,no hot water?

ew Optimax HE 31 C ,turn hot tap on ,no hot water.I have,nt tried c/h yet,just hot water.
Mend ferroli optimax he 31 c
1

ferroli optimax he 31 C?

What does code d2 on the display mean?
Mend display help symbols
4

No display on Ferroli Optimax HE 31 C control panel why?

Please help. The control panel has some lines on it (power is on) but no symbols at all - no fault codes, no p... [Read more]
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Mend vaillant f22 water hot

Vaillant ecotec 831 plus?
Mend Heating, Home Heating Systems

Greenstar 24Ri boiler, fast flashing - can I reset?
Mend Heating, Home Heating Systems

Siemens RDJ10RF thermostat problem?
Mend Heating, Home Heating Systems

How to fix my fireplace?
Mend 30 boiler fire flashing

Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Mend remove cover front

Remove boiler cover?
Mend Heating, Home Heating Systems

Remove cover off gas boiler?
Mend Heating, Home Heating Systems

Oil fired boiler thermostat?
Mend worcester boiler radiators months

Worcester boiler dripping water?

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