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Andrew Smith
Andrew Smith, HVAC Technician
Category: HVAC
Satisfied Customers: 3587
Experience:  Heating and Controls engineer
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i have an issue with my boiler, Valliant ecoplus, displaing con error. previously it showe

Customer Question

i have an issue with my boiler, Valliant ecoplus, displaing con error. previously it showed an error with low water pressure. i refilled the system now it is showing con. not sure what to try
Submitted: 1 year ago.
Category: HVAC
Expert:  Andrew Smith replied 1 year ago.
***** ***** : Has the low pressure error gone?
***** ***** : Can you confirm the boiler details or even better the GC number so I can dig out the manual
JACUSTOMER-rwh7dy1c- :

yes, well i had turned it all off at the mains, now it just counts the temp display from 0 to 60 odd a couple of times then displays the Con error

JACUSTOMER-rwh7dy1c- :

er not right now as i'm not at home

***** ***** : ok no problem
***** ***** : I can pause the timer until you respond later when you are near it?
***** ***** : A con error is a connection - do you have a wireless room thermostat?
JACUSTOMER-rwh7dy1c- :

sounds good

JACUSTOMER-rwh7dy1c- :

yes

JACUSTOMER-rwh7dy1c- :

can we pause then i will come back in about 1 hr

JACUSTOMER-rwh7dy1c- :

?

***** ***** : ok wait until you get home and then reply
JACUSTOMER-rwh7dy1c- :

np thanks

***** ***** : Better if it were a couple of hours
JACUSTOMER-rwh7dy1c- :

ok that's fine

JACUSTOMER-rwh7dy1c- :

1pm

JACUSTOMER-rwh7dy1c- :

hi, back again. so the boiler is ecotech 831 r1, afraid i don't know the GC number. it also has a Drayton Digistat RF1 wireles system thermostat

JACUSTOMER-rwh7dy1c- :

i have noticed the pressure looks to high, well into the red

JACUSTOMER-rwh7dy1c- :

hello are you there?

***** ***** : Hi, I missed you
***** ***** : Are you still around?
JACUSTOMER-rwh7dy1c- :

yes

***** ***** : Is the Con error on the boiler or the thermostat receiver?
JACUSTOMER-rwh7dy1c- :

boiler

***** ***** : Did you find the GC no.?
JACUSTOMER-rwh7dy1c- :

i have now actually just noticed a very small drip coing out of the bottom too

JACUSTOMER-rwh7dy1c- :

no, where would that be?

***** ***** : On the drop down flap
***** ***** : In the form of XX-XXX-XX
***** ***** : The drip would explain the pressure dropping
JACUSTOMER-rwh7dy1c- :

no sorry nothing there

***** ***** : Where did you e=get the Vaiilant name from?
***** ***** : Usually a big badge on the front inside the cover?
JACUSTOMER-rwh7dy1c- :

its on the serial number data on the bottom

JACUSTOMER-rwh7dy1c- :

the badge just says the name

JACUSTOMER-rwh7dy1c- :

Full Size Image

***** ***** : ok, let me do some digging
JACUSTOMER-rwh7dy1c- :

Full Size Image

***** ***** : ok, the last time i came across this error on your model it ended up being a PCB failure
***** ***** : Just to confirm this can you expose the pcb and take off one connection at a time and replace it and hope it clears the error
JACUSTOMER-rwh7dy1c- :

ok, so i guess that's inside, so will need to take the case off etc

JACUSTOMER-rwh7dy1c- :

should i turn it off at the mains

***** ***** : Yes, power down first
JACUSTOMER-rwh7dy1c- :

tried, still showing error

***** ***** : Sorry - only way to solve this is a new PCB
***** ***** : Parts Centre should be open until lunchtime tomorrow if that helps

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