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Rick Ridley
Rick Ridley, UK Heating Engineer
Category: UK Plumbing
Satisfied Customers: 1561
Experience:  30 Years on the tools, now retired, Ex CORGI
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I have a vaillant eoc tec plus 831 R1. The Status code shows

Customer Question

Hi
I have a vaillant eoc tec plus 831 R1. The Status code shows S.30 after a short while. The S.30 code, according to the manual says that Room Thermastat is blocking heating mode. I dont have a thermastat connected to this system.
Any suggestions
Submitted: 1 year ago.
Category: UK Plumbing
Expert:  Andrew Smith replied 1 year ago.

S30 is the code for 'no demand', this means that nothing is calling for heat.

ENSURE THE BOILER IS SET TO HOT WATER AND HEATING, MAKE SURE THE SYSTEM IS FULLY PRESSURISED AND THAT THE ROOM STAT IS TURNED UP.

IF YOU HAVE NO ROOM STAT THEN CHECK TO SEE IF THE PUMP STARTSWHEN YOU TURN ON THE HEATING ON THE BOILER

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