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Mend Boiler Fault Hot Cold

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We have 130 questions about mending 'boiler fault hot cold'

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Mend Heating, Home Heating Systems

I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?

I have a 30cx Glow worm boiler suddenly started to give cold water only. I don.t know how to fix it? I switche... [Read more]
Mend Heating, Home Heating Systems

Boiler runs not then cold cannot get constant temperature?

Have a fault with a isar he 30 boiler runs hot and cold all the time was told it was the diverter cartridge s... [Read more]
Mend Heating, Oil Filled Radiators

Boiler cutting out before heating hot water ?

I have a problem with a fire bird combi the boiler heats up from cold but cuts out when the boiler get hot but... [Read more]
Mend Heating, Home Heating Systems

Central heating not working?

My glow worm micron 50FF works for a short time then shuts down and both lights go out. Neither of the two lig... [Read more]
Mend Heating, Home Heating Systems

ideal logic 30?

the boiler has been showing low water pressure for about 4 weeks, we have been refilling it engineer cant find... [Read more]
Mend Heating, Home Heating Systems

Any ideas on how to fix my Ferroli Optimax HE Plus 31 C combi boiler?Ferrol?

Ferroli Optimax HE Plus 31 C 3 years old from new. Have heating but no hot water, when I turn on hot tap the D... [Read more]
Mend Heating, Home Heating Systems

ferroli f24b boiler intermittent f5 fault?

Dhw hot and cold, fan ok aps ok
Mend Heating, Home Heating Systems

how to find a fault?

my sister-in-law has a glow-worm 30c boiler the central heatings ok but when they turn on dhw tap the water i... [Read more]
Mend Heating, Home Heating Systems

Y Plan - Mid Position Valve 'fault'?

Hi, I have BGMVSP-23 'mid position' valve. (I believe a Y plan setup) Basically the pump only runs when ... [Read more]
Mend Heating, Home Heating Systems

Chaffoteaux maury britony combi 100 se, fault keeps changing!?

Hi I'm hoping someone an help. My boiler failed on tues, showing a fault 40 60 80. It was my fault as I had i... [Read more]
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