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Ask Rick Ridley Your Own Question
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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S30 showing. I have hot water but heating not working

Customer Question

s30 showing. I have hot water but heating not working properly and we are cold. I am not a plumber. Is there anything I can do?
JA: How long has this been going on? And how severe is the problem?
Customer: Going on a while but just came back from hols so house is colder now. Plumbers came before hols, put on a second pump on return pipe
JA: Do you plan on doing the work yourself?
Customer: only if its very simple otherwise ill have to get a plumber
JA: Anything else we should know to help you best?
Customer: don'r think so
Submitted: 9 months ago.
Category: UK Plumbing
Expert:  Andrew Smith replied 9 months ago.

S30 is the status code for no demand.

it sounds like your boiler does not know the tap is running?

Customer: replied 9 months ago.
I have hot water but no heating.
S30 means it's not registering a demand for heat from external controls.
Expert:  Andrew Smith replied 9 months ago.

ok. what type of room stat do you have?

Customer: replied 9 months ago.
Expert:  Andrew Smith replied 9 months ago.

ok, we can try a quick check to see if it is a stat problem.

Can you trace the wire back to the boiler (take a photo of the wiring) and disconnect the wires and replace with a link and see if you can get the boiler to fire?

Customer: replied 9 months ago.
Sorry but I can't wait 24 hours for an answer in the freezing winter!
I called out a plumber who fixed it for me.