Vaillant Fault F28 29 54, Resistance gas valve readings. 22vdc 16vdc. How to diagnose Vaillant fault

[@Ed-fp9rx]

really good video would of been nice to see you doing the resistance readings on the harness though

[@MHKBuildingSolutions]

@@Ed-fp9rx I will make another video showing the harness test.

[@Patent247]

Hello mate, had this exact same fault sequence. Changed the gas valve & all good for a couple of months, then started throwing the same faults again but managed to clear it and all good at the mo. 🤞. Seems to be common problem on these... Pcb next or scrapping tbh 😂

[@MHKBuildingSolutions]

I would say buy a refurbished PCB from eBay and change it if it gives you the fault again. These are very reliable boilers so worth keeping tbh.

[@cfgman1]

Probably the most comprehensive explanation I gave come across as you deal with both gas and electric issues...well done.
Keep up the standard
This fault was due to the gas valve and is a known design fault on the vaillants pros and plus which was kept quiet for many years.

[@MHKBuildingSolutions]

@@cfgman1 Thanks for your kind comments.

[@Razz60]

Very good video thank you for taking time for helpful video

[@MHKBuildingSolutions]

Thanks a lot.

[@Razz60]

@@MHKBuildingSolutions i think you shjd set up a training centre in the future because the way you explain things is very good we need more people like you in teaching

[@MHKBuildingSolutions]

@@Razz60 I am glad that the information is being received positively and helping others. Thanks for your kind words.

[@MrLibbyloulou]

Good learning video......wouldv'e like to see you doing your FGA tests....

[@MHKBuildingSolutions]

Thanks mate. Please don't forget to like and subscribe

[@zali1457]

Nice one mate 👍

[@MHKBuildingSolutions]

Thanks for the visit