Recent: How to Fix Hitachi DZ-MV550A Error Code 2881 | Guide

Mend > Home Heating Systems

Mend Glow-worm Compact 100e Boiler Pressure Leak

glow-worm compact 100e pressure drop?

I have a glow-worm compact 100e boiler which i have a problem with. I have a regular loss of pressure which i presume is a slight leak on the system, the problem is that when the system pressure is at the normal level i.e. 1-1.5 bar and the heating comes on the pressure increases to 4-5 bar? (the safety valve is not working correctly buts thats another problem). I would have thought that if the system is running at that pressure it would lose pressure at a greater speed but it seems to be ok until the heting demand goes off then it seems to lose all pressure? any ideas?

Neil
November 2008
Glow-wormGlow-worm Compact 100eHeating, Home Heating SystemsBoiler Pressure Leak
Hi, i am having the same problem but i know where the valve you are looking for is...its to the rear of the 100E...you need to remove the left side cover off the boiler...(control panel, burner cover/window need to be moved first), and you will see a large red plate size tank with a bike tire like valve on the top left...Pump this up to 11.6 psi, you will have to slightly over pressurize it as when you take the valve off you will lose some pressure....i have done all this but have no hot water and low heating so i think i need a PCB.....NICE.....
Hope that helped you....

Paul Roberts
March 2013
Neil,

I have exactly the same problem. I've been told there is a value on top of the boiler that you need to use to pump air into the boiler to pressurise it. Not by just readding the water via the taps. Only problem is that I haven't found out how to do this yet!!

Steve
November 2008

Automatic Answer

We may have found other answers which could help you.

Click here for Boiler Pressure Leak

Related Questions ...

Mend pressure heating expansion vessel
1

pressure and heating keeps going off?

my boiler keeps loosing pressure and going to 0 there is no leak in the house and no water coming out the pipe... [Read more]
Mend boiler pressure diverter valve
1

how can i fix my baxi 105HE?

my boiler water pressure keeps on goin up to nearly 3bar and expelling alot of water outside.CH works when i ... [Read more]
Mend eco boiler valve
1

how can i fix a leak to my baxi eco 80 boiler?

how can I fix a leak on my pressure differential valve it is leaking by the nut were the microswitch makes con... [Read more]
Mend boiler pressure leak
1

I am loosing pressure and can not find a leak ?

could I have a faulty pressure gauge loosing pressure but no leak to be found checked attic/walls/floor even o... [Read more]
Mend boiler pressure fault
1

Vaillant Ecotech Plus 831 F22 fault?

I've been having problems for 3 weeks now, and on the 3rd plumber, and still not fixed. First had F75 fault a... [Read more]
Mend temperature pressure sensor
3

Boiler Hot water intermittently losing temp, Heating seems fine?

The title explains the main issue, for some reason the hot water drops often every 20 secs or so, sometimes it... [Read more]
Mend boiler leak gas valve
1

Baxi combi 105e turned off to stop a leak but how to turn off gas?

i want to make sure my boiler is safe until i track down a plumber. I turned off the boiler at the mains whic... [Read more]
Mend boiler pressure leak
2

no leak but boiler losing pressure daily?

What couold be the problem other than leak, which we do not have, i have a vokera compact 25a fitted 2 years 1... [Read more]
Mend boiler leak combi
1

How do I fix my boiler water leak?

Vokera linea 28 combi boiler, water leak from underneath, replaced the pressure relief valve as I thought and ... [Read more]
Mend boiler leak heating
1

boiler pressure drops to 0 when boiler off?

have vokera unica he boiler almost 4years old recently noticed pressure dropping so simply topped it up now pr... [Read more]
Mend boiler leak pressure
1

valient turbomax 242eh central heating will not operate once it reaches tem?

242 eh installed with 3 rads the boiler works fine in hot water when in ch and hot water mode ch reaches temp ... [Read more]
Mend boiler pressure heating system pressure loss
1

How can I fix my pressure loss?

I have a Vaillant Eco Boiler which works very satisfactorily - EXCEPT the pressure needs topping up very often... [Read more]
Mend boiler pressure heating
2

my boiler is in need of help, as am i!?

please help, my boiler is reading 3.5 bar upwards when it is off, it is leaking a fair bit at the back, the th... [Read more]
Mend boiler pressure heating
1

Ideal Classic ff270 boiler keeps losing pressure?

The boiler is designed to operate at one bar pressure when cold. The sealed system has been charged (twice) b... [Read more]
Mend heating pressure fault
1

How can I fix my potterton peforma 24 boiler?

The boiler comes on but the burner/flame light does not come on at all. The flame fault indicator also does no... [Read more]
Mend boiler central heating fault

Central heating not working?
Mend heating hot water boiler

Which way to turn slotted screw to adjust water pressure up on a glow worm ?
Mend thermostat boiler heating

fitting thermostat?
Mend boiler repair heating

GS 24i junior boiler timer broken?
Mend Heating, Home Heating Systems

Glow worm flexicom 30cx auto air vent - how do I replace?
Mend working firing hot

My central heating is not working?
Mend water worm boiler

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

My radiators not heating up?
Mend heating error code repair

How to fix glow worm 18 hxi ?
Mend flat unit working

I have moved into a flat am dissabled carnt get heating on unit flashing F1?
Mend boiler heating error code

BMU error code?
Mend boiler heating fault

Home heating systems?

How to mend ...

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

Other models...

Glow-worm 155XGlow-worm 15hxiGlow-worm 18 HXIGlow-worm 24cxiGlow-worm 30 CIGlow-worm 35ciGlow-worm 45-60Glow-worm 70FFGlow-worm 80EGlow-worm Betacom 24cGlow-worm Betacom 30cGlow-worm CombiGlow-worm Compact 80eGlow-worm Compact ElectronicGlow-worm Express 100Glow-Worm Flexicom 30cxGlow-Worm FuelSaver MK2Glow-worm ikon-tGlow-worm Powermax 155Glow-worm Spacesaver

Related Categories

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

Topic

Glow-worm Compact 100e: Pressure Issues