How to mend ... Help Boiler 21

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]

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 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

Cant re-pressurise my saunier duval isofast condens f35e?

The pressure in my system has dropped to 0.5 bar so I have an error message 21 and no hot water or heating. ... [Read more]

Vaillant Turbomax 828 problem?

This is a strage one! I am not sure whether my diverter valve is on the way out or whether something else is c... [Read more]

Hello all, boiler not working properly?

Hello all, i have a very old combi c.h boiler (solaire model ghb 21/f t.02) which no one has heard of, i would... [Read more]

Worcester Heatslave combi boiler - removal of dom hw thermostat?

I have a 21 year old worcester oil heatlave 15/19 combi boiler (ser No 3/88/10/22450), but the domestic hot wa... [Read more]

potteton puma 100e lockout?

My potterton Puma 100e had been locking out when the hot water was being called for, the problem gradually got... [Read more]

Lock out after service on Worcester Bosch 20/25?

Can anyone help - just had my fully functioning Worcester Bosch 20/25 boiler serviced. The engineer replaced t... [Read more]

while running hot water boiler runs hot & cold for the duration tap is on?

tested gas supply 21 mb flow rate 12 ltr removed heat exchanger dhw clear changed both ch &dhw sensors checked... [Read more]

NO PILOT LIGHT ON GLOW WORM ELITE 21 PLUS BOILER?

THE BOILER IS BY GLOW WORM , THE MODEL IS ELITE 21 PLUS (SERIAL NUMBER (01013677) I CHANGED PILOT INJECTOR AND... [Read more]

how do i fix my heating system with a ariston microsystem 21 boiler?

i added a towel rad in the toilet on the downstairs circuit, but i cannot seem to get all the rads downstairs ... [Read more]

Ignition Problem?

My 21 year old Potterton Netaheat 10/16 will only ignite at the begining of each time setting when it has a fe... [Read more]

what does f40 and f30 mean?

boiler was working night before,went to have bath no hot water. boiler is on bar is on 2 but the temperature s... [Read more]

valliant boiler?

hi and thanks for taking the time to answer my question.... we cannot get any hot water for bath or shower o... [Read more]

Ideal Concorde thermostat problem?

I have a very big, very old Ideal Concorde 2a boiler (it runs 21 radiators!) Problem is it is too good! The ... [Read more]

Why does my Ferroli F24 keep going to "boiler lock out"?

I have a three year old Ferroli F24 gas combination boiler. At some stage of most days the boiler lockout (sh... [Read more]