Recent: Safely remove screen protector from a Macbook Air?

Mend > Home Heating Systems

Mend Glowworm 38 CXI Combi Boiler No Hot Water Central Heating

Glowworm 38 CXI combi boiler no hot water?

I have a Glowworm 38 CXI combi boiler. all was working fine. however we now have central heating but no hot water. each time the tap or shower is turn on the hot water will flow for about 5 seconds them run cold. Central heating is fine, water presure fine, boiler running at 1.7 bar

Dave
December 2008
it is 100% secondary heat exchange plate.I have had the same problem when the boiler was first fitted in 2007 and had it replaced under warranty by glow worm.since then i have had issue with it every 6 six months. having seen what the engineer did to take it out so now i remove and clean before installing the part myself. bad design. no problems with other makes.

aza
October 2014
I just had the 30CXI boiler done via Domestic and General insurance.
The PLATE Heat Exchanger 2801831 had the build up of black scale / sludge which was present. The engineer knocked the exchanger a few times and the sludge cam out and it's back re-installed and works perfect again.
This part NEW costsat £110 inc. Vat and Delivery.

Terry
October 2010
finaly got hot water, found a second hand boiler , changed the three way valve and motor. also the plate to plate heat exchanger.so i still dont know what part was faulty, the heat exchanger had a bit of crud in it, were as the second hand part looked very good. hope this may be of help to any one having the same problems.

p doughty
January 2009
We have the same problem, gas people thought it was a valve but turns out it was the heat exchange plate part no. 2000801831, there was a build up of black scale / sludge which has damaged it. even though there is no other sludge in the system.. Southern electric / gas have quoted approx £450 inc a new scale inhibitor and 4 hours labour to change it.

Matt Powell
December 2008
hi dave .i have the same problem with my boiler. its the same model .have changed the overheat stat and flow thermister. but still have the problem if i get any further forward in the next few days .ill let you know

p doughty
December 2008
2 - It is possible that the flow sensor is at fault so try and rule that out before committing to buying any parts.

Martin
December 2008
First have a look here:
http://www.glow-worm.co.uk/products/pdf/discontinued/boilers/CXI_range.pdf

The motor part no is: 801192. only ever done one of these and if my memory serves me I think it was a bit difficult as there is very little room to work on it.

Martin
December 2008
Martin,
is this expensive to fix

Dave
December 2008
I suspect that the diverter valve is the cause of your problem.

Martin
December 2008

Related Questions ...

Mend central heating hot water megaflow
1

Can't get hot water working, heating okay?

I've just moved house and have an Intergas Combi Compact Eco RF gas boiler with a separate Megaflow tank with ... [Read more]
Mend boiler diverter valve intermittent fault
1

Baxi Combi Instant HE80 boiler?

Intermittent fault on the hot water. Sometimes it comes on but when it doesn't I can sometimes get it on by tu... [Read more]
Mend boiler heating thermostat
1

combi oil Worcester greenstar heatslave 12/18 switches off?

I have a internal combi oil Worcester greenstar heatslave 12/18 Its has a built programmer and Hot water t... [Read more]
Mend pressure 24 combi boiler
2

Falling Pressure?

Each year at this time when I turn the heating on on my Linea 24 combi boiler after being off all summer, the ... [Read more]
Mend boiler combi central heating
1

how do you adjust the pressure on a vokera combi boiler?

Pressure right down to red . Central heating working ok but no hot water.
Mend boiler central heating hot water
1

How can I fix a Vokera linea combi boiler?

I have a Vokera linea boiler, the central heating seems to be fine, but we have no hot water. Does anyone know... [Read more]
Mend combi boiler no hot water central heating
2

Glow-Worm 30cxi combi boiler. No hot water.CH ok?

Turning on hot tap produces 30 secs.tepid water, then permanent cold. Central heating fine. Pressure 1.5 bars.
Mend combi boiler central heating flow switch
3

Central Heating works but no hot water? Worcester 28i RSF?

Hi I hope someone can help. I have a Worcester 28i RSF Combi boiler that i have a problem with. A few we... [Read more]
Mend combi boiler central heating lockout
1

alpha c23 combi boiler?

no central heating or hot water,boiler goes to lockout,tried reset button.
Mend Saunier Duval Combi Boiler Central Heating
1

No c/h working saunier duval f23e combi boiler?

hot water working fine but when turning the central heating on it fires up for a few seconds and then switches... [Read more]
Mend boiler combi boiler central heating
1

Baxi 105e Combi - Hot then cold water cycle?

Hi, I have a BAXI 105e Combi boiler in the house I have just brought, it was installed in 2006. I have noticed... [Read more]
Mend hot water not central heating
1

Hot water but not central heating . . ?

I have just moved into a flat which has a Sabre 29HE Plus combi boiler. It is heating the water but when I sw... [Read more]
Mend boiler central heating hot water
1

how can i fix my proline combi boiler 120 he?

hot water ok but no central heating
Mend combi boiler central heating boiler repair
1

how can i fix?

I have a combi boiler but can only get hot water and no central heating. Can you help please?
Mend boiler combi boiler ignition failure
1

faillure to ignite?

My Vaillant VCW GB 242 E Combi Compact Wall Mounted Boiler is failing to ignite when the central heating is sw... [Read more]

How to mend ...

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