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Hello. I am a combi repairman. I also repair certain parts of combi cards myself. I replace certain parts of the types of faults I take note of. Can you also specify which part on the card we need to replace in the f27 fault caused by the card in this combi?

This is a project for people to build themselves. In the description ' more' you should find a link to all the files. I only have a few blank PCBs I could supply. You could easily build on breadboard...there are very few parts but yes, some electronics experience is desirable.

Do I have to build this myself, or does it come in as a kit

What is the phone to contact?

Thanks a lot

Can you diagnose it's a capacitor issue for error F27 on a pcb which relates to the fan issue Regards Muwafak

Great video and instruction thanks 👍. Getting confused with the range of replacement capacitors to buy, especially the voltage. Any links or product specs available? Many thanks 😊

Ecotec pro 28 r2. Hot water on, Pump runs, diverter activates, fan comes on for a second, then off. Repaets this cycle. Vaillant tec says PCB. Is this this the possible fault on the pcb? Thankyou

Vaillant is rubbish boiler, over rated and over priced. Always issues with PCB, gas valve and fan. Parts are very expensive as well.

Mine failed the engineer just replaced the PCB he said it was the big cap, the landlord covered the cost. He suggested there had been a power surge 😮 I did think from my a previous engineer job why can you just change the cap. Good video mate. It would be good if you could get broken boards and sell them covering your time changing the caps. Like you said let's try save the planet. The new board is significantly different

Ive hot f61 issue.. intermittent and temp jumping around ecotech 28....so capacitor issue? Where to buy?

Same here, replaced the shown caps and boiler's running well without flagging any errors (f61 before). Thanks!

Hello, I'm getting the 'con' error on ecotec pro. Readings jumping around. No pilot. Was switched off at spur. Is there anything I can do to fix con error?

just replaced pressure sensor on ecotec 630 F75..... Wouldn’t come back on so used a hair dryer suspected caps came back to life Couldn’t see voltage of caps as back on so thanks for info Can i just ask why you changed value to 1000uf on C5. Fixed my american fridge freezer a few years back same issue Caps only have so many 1000 hrs of life and these devices are on 24/7

Muchas Gracias! He podido solucionar el problema sustituyendo los dos condensadores electrolíticos de 470uF. Antes, para asegurarme, he mirado la resistencia interna de la válvula de Gas y me daba una lectura correcta. Ánimo a las demás personas. No es una tarea muy complicada y ahorras mucho dinero.

Hi, we get F62 and F28 but also water pressure keeps dropping few times per day.. is it PCB please?

I have a question… My EcoTec pro 28 has been shutting down every now and then, and the fault codes have been F61 and F62. I have observed the temperature gauge like the one explained on this video but the temperature doesn’t jump like on this video. Does that mean it’s not the fault described here. If so, what’s the way to diagnose the other possible faults? Many thanks in advance for any replies. This sounds like the place where the knowledge is hiding 👍

can you do on my boiler? happy to pay of course?

Hi..I just did this to my vaillant 837 eco tec plus and it worked...so I have 2 837s,, 1 at my dad's and 1 at mine...my dad's was faulty showing f62 and f61...swapped dad's pcb to my boiler and f62 came to my boiler where as my dad's boiler worked...so 💯 it's a faulty pcb...I had an older pcb from a 3rd boiler too capacitors off and boilers back on working....no temperature jumps......saved 180£ on a new pcb

Brilliant......just changed my caps and working again!!! Saved a fortune...thankyou!!

hi can you tell me when i open the hot water the heating comes on

It's always the pcb causing a voltage drop across the board components, if it's an old boiler 8 + years old then it's not worth spending the ridiculous amount of money on a new pcb , there are plenty of companies around where you can part exchange your old board for a reconditioned board at a fraction of the cost of a new one.... 👍

wished I found this video earlier.

Hello, I've seen SIMILAR ( Capacitor ) fix-suggestions on other ( identical F.61 related ) youtube entries. The appartment from my Son has a Vaillant ecoTEC Plus and since a short while, we had fully identical results. F.61 points to GAS-valve or PCB according to most found info. GAS-valve, as found in other info, can easily be MEASURED. The outside PENs ( after removing the plug from the gas-valve, 2-wites go to the 2 pens related ... ) should have a Ohm-reading from between 40 to 60 Ohm. I my case it was 54 Ohm ==> correct so NOT a GAS-valve issue. We also had these DISPLAY reading 'swings' where temp was jumping ... around. I bought two new capacitors ( 470 uF, 35V , 105 degrees Celcius specs... ) and removed the old to insert both new Capacitors ( mind the POLARITY since there is a + and - . CONFIRMATION all is fine : System is running nog for a week and all is stable and fine. Before, the issue did occur every x-hours. One important point is the Temperature specs ( 105 Celsius ) from these capacitors. They are situated on the TOP when the machine is closed and by that, they are relative close to the real HEATING centre. Capacitors possibly 'dry-out' because of this heat. The inside fluid DRYs out , and then their Capacity function/role can no longer be handled. Possibly the reason from the issues. The price from these two capacitors ( NEW ) in an Electronic-shop was less then one EURO for both together . This is nothing compare to the price from a PCB. In my case I found the replacemtn PCB on a web-page in a shop near-by, priced around 280 EURO ( without TAX ) ... So this FIX for less then one EURO was a HIT. THANKS for your input and please keep up the good work to INFORM.