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Mend Help Boiler 21

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We have 34 questions about mending 'help boiler 21'

How to mend ... Help Boiler 21

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How do I change temperature settings?

My temperature has been showing 25%, I tried to lower this to 21% but it now shows 27%. Is there an easy way t... [Read more]

danfoss setting boiler times/temperature?

Have set 4 programs start/finish for morning and evening at 21 degrees - however the boiler comes on in betwee... [Read more]

Boiler seems to be running cooler?

We have a Worcester Heatslave 20/25 boiler and it has been fine so far with regular maintenance. when the hea... [Read more]

Thermostat for boiler stuck at 5 tried to raise it too 22 by pressing the u?

Room temp is 21.5 but I tried to raise the thermostat from 5 too 22 but it won't move when I press the up butt... [Read more]

Saunier Duval F35E auto-vents down to code 21 in minutes?

7 year old boiler, noticed code 21 (radiator circuit pressure low) so she opened the filling loop but left it ... [Read more]

How can I fix my boiler?

Fault 21 flashing Semia boiler

Query boiler not giving heat or hot water?

I have a Saunier Duval F24E:2 and the red and green lights as on constantly. The thermostat is showing at 21 ... [Read more]

why does heating cut in when thermostat at 0?

Is my modairflow thermostat faulty? it controls my JWD38/50 hot air Johnson Starley boiler but the hot air com... [Read more]

How can I fix my boiler?

The boiler is 21 kW Siemens model, and there is a problem with the water flow relay - it is not reacting (whe... [Read more]

Digistat Rf3?

Any suggestions on an Rf3 Digistat, where everything is fine except for the room temperature display, which is... [Read more]

Can anyone help me with my Myson Boiler?

I have a Myson Back Boiler and it is 21 years old, it ignites when I put it on and then gos out, after a while... [Read more]

How can i get the radiators and hot water working after buying gas?

I have a Vokera compact 25 using an Altech stat. I just bought credit on my gas after running out of gas compl... [Read more]

where is the loop fill valve?

need to repressurise my saunier duval semia condens boiler as i have display code 21

2nd question. Heating not working right on my worcester 240 combi RSF?

Heating goes on then after a min or so the boiler goes off and on with a clicking sound like its trying to sta... [Read more]

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Mend Help Boiler 21

How to mend ... Help Boiler 21

How do I change temperature settings?

danfoss setting boiler times/temperature?

Boiler seems to be running cooler?

Thermostat for boiler stuck at 5 tried to raise it too 22 by pressing the u?

Saunier Duval F35E auto-vents down to code 21 in minutes?

How can I fix my boiler?

Query boiler not giving heat or hot water?

why does heating cut in when thermostat at 0?

How can I fix my boiler?

Digistat Rf3?

Can anyone help me with my Myson Boiler?

How can i get the radiators and hot water working after buying gas?

where is the loop fill valve?

2nd question. Heating not working right on my worcester 240 combi RSF?

How to mend ...

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