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Vaillant ecoTEC F76 fault code

June 15, 2025

Vaillant ecoTEC F76 fault code

Vaillant ecoTEC Plus boiler with F76 fault code

This is a clip of a Vaillant ecoTEC displaying the F0, F.0 or F.00 fault code.

This is a clip of a Vaillant ecoTEC Plus combi boiler suffering from an F76 fault code.

The F76 fault code is one you don’t generally want to see on a Vaillant ecoTEC boiler.

On some ecoTEC boilers they have a thermal fuse built into the primary heat exchanger. If the thermal fuse is exposed to excessive heat(200 degrees celsius), the fuse will fail and your boiler will stop working and display the F76 fault code.

This fault code technically means that you need to replace the primary heat exchanger as it has been exposed to too much heat and it is damaged and cannot continue to work safely hence the fault code.

Sometimes the wiring harness can fail which will also cause this fault code to show.

The benefits of using us to repair your Vaillant boiler.

Local engineers on time

You know that when you call us you’re going to get a local, experienced, Gas Safe registered heating engineer with over a decades worth of experience working on Vaillant ecoTEC boilers, who will turn up if they have promised to do so.

12 Month guarantee

To provide you with the best possible service and peace of mind, we always provide a minimum 12 month guarantee on any parts fitted to your Vaillant boiler or central heating system

What our customers say about us…

I’ve used Richard to service my boiler for several years. He is extremely professional, knowledgeable and thorough. The first time he looked at my boiler he fixed a problem that several other engineers had failed to fix, and even refunded me when a part he had bought turned out not to be needed. Real integrity and a desire to do the best for his customers. I don’t think you’ll find anyone better.

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Tim

I can’t recommend Richard highly enough. He came to fix our boiler at short notice, provided a comprehensive service and has given it a new lease of life. He had all the parts required so no delays in waiting for parts. He is extremely knowledgable and competent and clearly passionate about what he does. Thank you!

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Gareth

Need an urgent Vaillant boiler repair in Rotherham?

Thanks to our extensive professional experience working on Vaillant ecoTEC boilers, and all the Vaillant boiler spares we carry, most broken Vaillant boilers are repaired with just one visit – getting your Vaillant boiler up and running as soon as possible.
Aside from offering a great price on boiler repairs, we also offer a 12 month guarantee on all parts fitted to your Vaillant boiler or central heating system.

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Article by Rich

Rich is a Gas Safe registered heating industry professional that specialises in boiler repairs and maintenance on Vaillant boilers and some of their Glowworm derivatives. He has over 15 years worth of experience working in the heating industry, and well over a decades worth of experience working on Vaillant boilers.