My son's 6 year-old Glowworm 30cxi condensing combi is unwell. He noticed no dhw, then saw the display flashing all bars and noticed that the boiler was making "some noise". He power cycled it: no change; power cycled again: this time no display, no sound, nuffink. No F codes at any stage.
I've established that there's 240v at the pcb, and that the pcb fuse is intact.
Could it be anything other than, or as well as, the pcb? I've seen references to fixed price repairs - who offers these? BG? Glowworm?
I'm happy enough to swap a pcb, but I gather they're not exactly cheap, so I'm hesitant to do so if another component is going to make it let its smoke out.
Son has decided to bite the bullet and pay Glow Worm. They offered three options:
Fixed price repair - £260
One year service agreement, including initial repair but with £99 excess on any subsequent repairs - £200
As above, but no excess - £300
Careful questioning as to why anyone would go for the £260 option instead of the £200 revealed that they don't offer the £200 one for boilers over a certain age. Hmmm.
So they're coming tomorrow. I'll report the outcome.
They came, as agreed, on time (07.30), and replaced both the main and the display pcbs. I couldn't quite follow why the display board needed replacement. They also replaced the inner door seal and main burner seal, and ran the usual basic checks, but not the gas consumption.
No adverse comments about the (non-Corgi) installation apart from disliking the use of about a yard of 22mm copper for the first part of the condensate drain.
We'll see how things go from here, but I'm beginning to conclude, from a sample of two, that modern boilers are one of the few cases where some sort of maintenance agreement is a Good Thing.
Two other points from the repairman: maximum length of outside condensate drain in 21.5mm is now reduced to 1m; and when asked which make of boiler he'd buy for himself, he unhesitatingly said Vaillant, because W-B standards had dropped recently.
replying to Kevin Poole, J. Haywood wrote: I have a Glow Worm 30CXi and it was dead when be bought the house. We were quoted £300 to replace the printed circuit board. Being an electronic engineer, I wasn't about to pay that without looking at it first, so this is what I found:
Symptom - Dead, no display and a faint ticking sound when the power is turned on or takes a long time to power up from cold. Fuse F100 is intact.
The switch mode power supply (adjacent to the fuse) is not starting up. This is caused by a faulty electrolytic capacitor C805 situated at the bottom of the PCB near to the fuse. This is a 47uF @ 50v. Be sure to obtain a 105 degree type, not a cheaper 85 degree as this will provide a much longer service life.
A suitable type is available from RS components
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part number
520-1567 priced £1.50 for a pack of 5!
It may also be worth replacing C813 100uf @ 25v on the power supply secondary at the same time. This is situated at the bottom of the PCB to the left of the small transformer.
A suitable type is 519-4150 from RS priced at £1.00 per pack of 5.
Remember to isolate the boiler mains supply before touching the PCB as it is very, very live!!!
OK fair comment and I apologise, but please could you read the quote below the ellipsis, it was written by John Rumm who has more tact and diplomacy than myself, it dosn't excuse my rudeness, but it might explain our frustration in this matter. Homeownershub.com only exists to make money for its owner via the ads and clickbait. USENET on the other hand has managed for over 35 years without any of that.
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If you have been using the Home0wnersHub web site, you may have wondered why a number of posters seem rather confused by some of the messages you have been posting. Hopefully this post will make clear why this is happening.
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Like good comedy, Timing is everything =======================================
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Quoting =======
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Setting aside the comments about the route of Mr H's reply, I'm grateful for something else to go onto the "it might come in handy" shelf.
The boiler in question has performed faultlessly since then, but I'll be well prepared if it fails again. If I can remember which shelf I put the information on.
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