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Central Heating

Vaillant boiler turns on heating without thermostat

Anonymous user 23/02/2024 - 3.33 PM

We have a Vaillant combi boiler with a Hive thermostat. We have recently noticed that the Central heating is coming on whilst the Hive thermostat is still showing it as off. The boiler display shows a heating symbol which is either on or flashing. We are currently resolving this by turning off the boiler from the mains and turning it on again. What is the issue and how can we resolve it? Thank you!

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4 Answers

The First Element

Rating: 4.9 out of 5
Swindon
Is your boiler a combination or heat only/ system?
Answered4 July 2020
2

Anonymous user

Maybe your 24v link hasn't been removed ?
Answered26 July 2020
1

AN Heating and Plumbing

No reviews yet

Dagenham
The timer on the boiler may overriding your hive. Disable timer on the boiler.
Answered16 July 2020
0

Anonymous user

If is combi either state is faulty or divertervalve is stuck if system boiler the check motorised valve. Heating side is faulty to confirm test must be carried out.
Answered30 July 2020
0