Recent: Toilet Push Button not flushing properly?

Mend Ariston Home Heating Systems

Mend Heating, Home Heating Systems
Find out how to mend it for free.
Ask Question
Mend Heating, Home Heating Systems
Click here to mend Ariston home heating systems

Mend home heating systems ...

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]
Mend Heating, Home Heating Systems

Siemens transmitter error?

Rdj10rf stuck on start screen after putting in new batteries
Mend gas ignite hand

Kohlangaz Gosford HE fire?

My Kohlangaz Gosforth HE gas fire will not ignite, My hand set controller is displaying E56 , it will also not... [Read more]
Mend Home Heating Systems

Mend > Home Heating Systems

Mend Ariston Causing Pressure Valve

What is causing my Ariston boiler microsystem 21RFF1 to gain pressure ?

What is causing my Ariston boiler microsystem 21RFF1 to gain pressure causing the safety valve to open and shuts the boiler down - not due to overheating.

John Shailer
November 2008
AristonHeating, Home Heating SystemsCausing Pressure Valve
I have changed the expansion vessel and it is now working perfectly

John
November 2008
There are several things that can cause this problem, does the pressure increase when the boiler is not in use? if so maybe the filling loop is letting by or your water to water heat exchanger has failed, try disconnecting the filling loop and check if the pressure still increases. If the problem is when the boiler is running then it could be your expansion vessel has failed or just needs to be re-pressurised (with air).

Martin
November 2008
Mend Heating, Home Heating Systems
Click here to mend Ariston home heating systems
Mend code 28 pressure

error code e02 wont work when pressurised?
Mend boiler keeps going out

boiler keeps going out?
Mend ariston combi left

No display on Ariston e-combi approx3yrs old?
Mend ariston boiler turned

What is the problem?
Mend microgenus 23 mffi

Ariston Microgenus 23 MFFI PCB Defect?
Mend code running tap

I have an Ariston Clas He system with an error code of 1P2?
Mend boiler ignite 24

ariston boiler slow to ignite?
Mend error ariston boiler

I have error code 108 on my Ariston Combi boiler what do I do to fix it?
Mend going reset ariston

gas boiler keeps going to reset?
Mend boiler moved ariston

Why does my boiler remain ON - even when switch is moved to OFF?
Mend boiler showing manual

I have an Ariston Genus boiler. Fault showing 30 40 50, I can't find manual?
Mend light ariston going

Error light blinking (orange colour) on Ariston e-combi boiler?

How to mend ...

Find out how to mend just about anything howtomendit.com for free repair help, information and advice.

Related Categories

Mend Convector Heaters
Convector Heaters
Mend Fan Heaters
Fan Heaters
Mend Oil Filled Radiators
Oil Filled Radiators

Mend Heating, Home Heating Systems
Click here to mend Ariston home heating systems

Try fixfault.com to fix home heating systems.