LED 6 yellow (0) [DHW mode] Medium

Ferroli LED 6 yellow (0) [DHW mode] Fault Code

Also written as LED6YELLOW0DHWMODE — same fault.

The Ferroli LED 6 yellow (0) [DHW mode] fault code means: your boiler is struggling to detect the temperature of your hot water because of a faulty connection or sensor, which means it will likely stop providing hot water until fixed.. It appears on 2 Ferroli models in our database.

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.

Technical description: Short circuit on D.H.W. sensor (42) or resistance lower than 500 Ohm
Typical repair cost £120-180 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →
Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like LED 6 yellow (0) [DHW mode]: 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.

Ferroli models that show the LED 6 yellow (0) [DHW mode] fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ferroli LED 6 yellow (0) [DHW mode] fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026