Comment By: R. Garratt

Posted: 28th April 2010

There is no mention of plate to plate heat exchanger blocked / inefficient. Is this actually fault code 14 and why there is so much confusion over it. There is a funtion in the IRIS software where the DHW temperature control is taken over by the CH flow thermistor know as antiscale. It allows limited use of DHW without complete failure. If this is not fault code 14 which one is it?

Comment By: admin

Posted: 28th April 2010

Hello R Garratt

I’m reliably informed that no Glow-worm boiler uses IRIS software. My colleagues have suggested therefore that you may not have a Glow-worm boiler (thus rendering the advice in the post irrelevant!).

I would suggest that you check the make and manufacture of your boiler.

I’m sorry I can’t help more!

Cheers, Sally

Comment By: V Rushton

Posted: 12th August 2010

The pre heat how do you disable this?

Not the quietest boiler I have had – why are they noisy? Fires up after only second or two turn of the hot tap is this a fault?

Kind regards

Comment By: admin

Posted: 24th August 2010

Hi V Rushton – sorry for my delayed response.

Disabling this function depends on the exact boiler you have. Without further details it would be impossible for me to advise.

Give our technical team a call on 01773 828300 or contact your installer – make sure you have details on your boiler to hand!

Cheers

Comment By: David

Posted: 17th November 2010

Ultracom 38cxi. The control pannel on this boiler is an absolute disaster, its way to complex and impossible to use without referring back to the instruction DVD for step by step instructions. For simple stuff like setting the clock up (which keeps very bad time) and day by day on/off settings it should be possible for the average user to do this without any reference to instruction books/DVDs at all. In fact in this day and age why cant I programme the boiler from a simple app on a notebook either by USB or over an ethernet network or better yet remotely from an iPhone App?

Also, the instruction DVD makes reference to ‘Level 3 7 day central heating and hot water pre-heat programme’ All very good stuff I’m sure. Be even more useful if you bothered to explain what this ‘per-heat’ did and what operational benefit I might expect from this feature!

Comment By: admin

Posted: 18th November 2010

Hi David

Sorry to hear you’ve had problems with your boiler and it’s controls.

I’ve sent some feedback on your concerns to my colleagues so that they can look into the matter further.

In the meantime I have a PDF user manual I’d be happy to supply to you and which you may find easier than the DVD for a quick guide?

As an aside when setting the times for hot water on/off this is purely for the pre-heat and does not mean in an off period there would be no-hot water. The preheat function will fire once an hour to keep the plate to plate heat exchanger hot providing a quicker response for hot water when asked for.

I’d be happy to send you a DM with further details – let me know if you’re happy for me to get in touch or pass on your details to one of my colleagues internally.

Cheers, Sally

Comment By: cheryl

Posted: 12th December 2010

we have just moved into a new house and it has glowworm boiler we have read through all the manuels that come with it and still cant get to grips with the system its a absolute nitemare is there a dvd you can send to us please help!!!! opr a better step by step quide thanks

Comment By: admin

Posted: 21st December 2010

Hi cheryl – you will find guidance on our installer site at http://www.glow-worm.co.uk/literature. If you’re having problems though please get in touch with my colleagues in Group Service on 01773 828100

Comment By: birdy

Posted: 19th January 2011

we have a 38cxi boiler which just recently came up with an F9 fault. A plumbing engineer came and reset the pressure which was at .7 bar to that recommended. He then took out the pressure sensor cleaned it and made sure water was flowing, then checked the pump which was clear and working. He now says that the probable fault is with the circuit board. can you please advise prior to us changing the circuit board

Comment By: admin

Posted: 19th January 2011

Hi David

Is the fault still with low water pressure? or is the pressure displayed above 1 bar? if so then when does it go to F9, is it during ignition or doesn’t it even get that far? There could be a number of possibilities for the fault, it might be better to ask your engineer to give us a call directly when he is front of the boiler so we can go through some voltage checks with him. Our telephone number is 01773 828300, and we will be happy to help.

Thanks

Comment By: Andy Duckers

Posted: 04th March 2011

We have a glowworm boiler and on start up loud banging can be heard. On several occasions it gets very loud and even trips out the boiler.on restarting the boiler, the noise dissapears and works as normal. we have had an engineer out several times and he has tested the boiler and says everything is as it should be. Is this normal. I assume the banging is air in the system, but as it is a closed system , and all readiators have been bled, i am at a loss to where the air is coming from. Andy advise please

Comment By: admin

Posted: 04th March 2011

Hi Andy – sorry to hear you’re having trouble. We’ll certainly do our best to help – I’ll need more information from you if possible so I’ll send you a DM with some questions and the best contact email. Cheers, Sally

Comment By: Alan

Posted: 23rd May 2011

Hi, I have an Ultracom 38CXI and I’d like to know if it’s possible to either turn off the hot-water pre-heat or set it to only pre-heat at certain times of the day. We only use DHW at certain times, so it seems wasteful to keep the water heated all the time.
How is this changed?

Best regards,

Alan

Comment By: admin

Posted: 24th May 2011

Hi Alan – yes you can turn the pre-heat function off, but unfortunately you can not program it to come on at certain times of the day. To turn it off, press and hold the mode button for 5 seconds till you get a flashing 0, use the – key of either the heating or hot water and scroll to 96, press mode once then you should see d0. Use the + or – key to scroll to d74, if a 1 is shown above d74 then it is on, so press mode once so the 1 flashes, change that to a 0 with the – key, press mode once then keep your finger on mode for 5 seconds till you go back to the main screen. This has taken the pre-heat off for you. Hope this sorts if for you.

Comment By: Joan English

Posted: 31st October 2011

Dear Glow.Worm
I have a 24hxi boiler and am having a problem with it. The boiler is showing fault F 26, saying that there is a fault with the Thermistor. The boiler is quite noisey and there is a loud knocking noise from the boiler when it appears to fire up. I have had a plumber out to the boiler and he has replaced the Thermistors, which hasn’t solved the problem, the boiler is tripping out still with fault F 26. This is happening during the day and doesn’t appear to happen at night. I have the program on my heating system to come on at various times during the day and as mentioned the fault appears during the day nothing at night. I have tried to pin down the time of it tripping out to see if it coincides with the times on the progamer, but it doesn’t seem to be.
I am a bit alarmed as I am being told that it’s a case of elimination now, ie the pump or the heating exchange, all of which are a very costly affair. The boiler isn’t that old I believe 5 years. My previous boiler was over 25years old. The system was power flushed in February 2010.
Any assistance you can give would be appreciated.
Regards
Joan English

Comment By: Joan English

Posted: 31st October 2011

What does ‘Your comment is awaiting moderation’ mean please?

Comment By: admin

Posted: 01st November 2011

Hi Joan,

If the boiler is on F26 and knocking and banging, it would indicate the 2 things mentioned like a slugish pump or some dirt or debris within the heating system. If the system is over 25 years old there would be some serious deposits of debris in there, and just having one powerflush wouldnt really get rid of all the debris within there.

It sounds as though now that dirt has gotten into the pump and maybe slowed it down and possibly the heat exchanger which is causing the banging noise.

We’d advise you to contact an engineer to consult and make sure everything is 100%. He or she will be able to provide more information on a powerflush.

Hope everything is sorted soon.

Comment By: admin

Posted: 01st November 2011

Hi Joan, we moderate comments to ensure that comments comply with the terms we set out for forum users. Hopefully you will have seen the response to your query but please let me know if you need any further help.