Medium
F.581 on Viessmann Vitodens 200-W B2KE-32

The boiler has lost the signal from one of its room thermostats, so that heating zone is running on outdoor-temperature settings alone and may not heat your rooms as accurately as usual.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Control mode without room influence - Lead break, room temperature sensor, heating circuit 3

From this model's manual
Verified against the Viessmann/Viessmann Vitodens 100 W Wb1a installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Switch off the boiler at its isolator switch or fused spur, and wait about 30 seconds.Locate the room thermostat or sensor for the third heating circuit and check that its cable is securely connected at both ends, without pulling or damaging it.Restore power, then reset the boiler from the control panel. If the code returns, contact a Gas Safe registered engineer.

Find a Gas Safe engineer
Search the official register →
Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like F.581: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Related fault codes

F.580View →F.582View →

All 170 fault codes on the Vitodens 200-W B2KE-32

Seeing a different code? Every code this model can display, in one place.

F.7F.8F.9F.10F.11F.12F.13F.14F.15F.16F.29F.30F.49F.50F.57F.58F.59F.62F.63F.65F.67F.68F.69F.70F.71F.72F.73F.74F.77F.89F.91F.92F.93F.94F.100F.104F.142F.160F.161F.162F.163F.182F.183F.184F.185F.299F.342F.345F.346F.348F.349F.350F.351F.352F.353F.354F.355F.357F.359F.361F.365F.366F.367F.368F.369F.370F.372F.373F.375F.377F.378F.380F.381F.382F.383F.384F.385F.386F.387F.388F.395F.396F.399F.400F.401F.402F.403F.404F.405F.406F.408F.410F.416F.417F.418F.425F.426F.427F.428F.429F.430F.432F.433F.436F.437F.440F.441F.442F.443F.444F.445F.446F.447F.448F.449F.450F.451F.452F.453F.454F.455F.456F.457F.458F.461F.462F.463F.464F.467F.468F.471F.473F.474F.517F.527F.528F.530F.538F.539F.540F.542F.543F.544F.545F.546F.547F.574F.575F.576F.577F.578F.579F.580F.582F.666F.667F.668F.669F.670F.671F.672F.673F.682F.683F.684I.55I.56I.57I.59

Related guides you might find useful

Radiator not heating up

One cold radiator is usually a stuck valve pin or trapped air.

Read →

Hot water works but heating does not

On a combi it is usually the diverter valve. On a system boiler, the motorised valve.

Read →

Thermostat not working

Change the batteries first, even if the screen still works.

Read →