"URGENT" Combo Boiler PCB HELP.....

[12345678@9]

Urgent
I have a Alpha CB28, 5yrs old, not working since new year’s eve...
No HW and CH is not working, A & B Neon light Flashing at same time...
Plumper came around the other day and identified the fault due to the fan was not working, as no power is received from the PCB, using a tester screwdriver no power picked up from the fan slot in the PCB.
Plumper told me PCB needs to be replaced, went out and got the price for us = 210 ex vat + £60 labour....Told him we will get back to him...

Using the spec I found out it requires a 1.025576 PCB, (Alpha CB28 PCB 1.025576 - AK Boiler Spares), after digging deeper found this deal £150 cheaper. (ALPHA PCB 1.025576 (CB RANGE) on eBay (end time 10-Jan-11 22:06:58 GMT)).


I really need your help, after opening up the boiler to compare the two I found out it’s a bit different, i.e the black rectangle bar kinda thing on the PCB next to the red square thing on the eBay picture it say V1.00 and on the PCB in the boiler it says V2.01.



Please can you tell if this one is suitable for my boiler….

 

[mfgs]

For a start you need a multimeter to properly test for current, a neon isnt really that accurate. That is the right part number for the pcb, the old one was 1.017118 which was replaced by 1.025576 which would explain why it may look a little different. Manufacturers often alter the design of parts over the years to improve them if there have been a few issues.

 

[quality]

Looks like you have just wasted £60 quid

 

[Blake]

Welcome to the forum If you have doubts about your plumbers/gas engineers honesty or believe he may be overcharging you then get a 2nd opinion/price.

Please do bare in mind that you are paying for the engineers expertise which means you do not have the worry of buying the wrong part or having to wait days for it.

The link on ebay is from a seller with zero feedback, so I personally would not take the gamble.

 

[12345678@9]

@quality ?
@mfgs are you 100% sure this PCB is compatible with my boiler?

 

[12345678@9]

@bronzino thanks, btw any tips?

 

[12345678@9]

Welcome to the forum If you have doubts about your plumbers/gas engineers honesty or believe he may be overcharging you then get a 2nd opinion/price.

Please do bare in mind that you are paying for the engineers expertise which means you do not have the worry of buying the wrong part or having to wait days for it.

The link on ebay is from a seller with zero feedback, so I personally would not take the gamble.

Thanks, but I was just wondering if anybody know for 100% sure its compatible with mine, then... you know £150 cheaper...

 

[gasmarc]

i will wish you good luck because you will need it, keep us posted on the final bill please

 

[buffy27]

get the dude to do the work ..get it done right .what will u do with all your spare time when its sorted ...lol

 

[tamz]

Just did a comment about this type of thing here
http://www.ukplumbersforums.co.uk/gas-safety-registered-plumbers/16255-call-out.html

Wonder if the "plumper" got any cash from this one?

 

[blake10660]

check the flow switch near the pump . bridge the wires out.make sure power is off. the turn on . if it fires up .replace flow swich.20/ 30 pounds.

 

[stevetheplumber]

i hate the internet customers spend two hours searching to find parts cheaper than your local supplier then call you a rip off then when the parts theyve ordered turn up faulty or wrong they dont want to pay you for your time
had this recently with a boiler i gave the price to supply and fit and customer asked me how much if they supplied the boiler
we agreed a price with them suppling
when i got there there was no flue of clock with the boilerso i said they would have to go and get them local or i would supply
they agreed to let me supply
when i gave her the bill it worked out to more than the original estimate as the flue and clock were obviously more exspensive bought as spares rather than as a package and i added my time to go and get them she wasnt happy but eventually paid up

 

[Blake]

I went to the dentist last week and they wanted £190 for a white filling, i asked how much it would be if I supplied the materials and they asked me to leave

 

[Mick Helpful]

The black rectangle thing is with about 24 - 32 legs and three electronic capacitors below it is probably an eprom chip which contains the settings for that particular board. Eproms are individually programmed and the V number refers to the program variant. the board that failed has the later version of the program. If its mounted on a socket its plugable & you can change it or take it out and get it copied onto another chip.
It seems as though the switching circuit or relay to the fan has failed but it could be an electrolytic. To test the electrolytics you'll need an ESR tester. If you take the chip out make sure you're earthed.

Since there's no circuit data and you have no electronics knowledge, nor an ESR tester, nor a DMM get it changed by a plumber or plumper and grin and bear it. At least the boiler should work afterwards

 

[SafeGasInstall]

stevetheplumber well done mate !!!!

Now I can see this poster will face more charges then he thought, but will he learn from his mistake NO !!!