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Is your heat pump showing an error code?

The exact meaning of your code and the checks to make, in just seconds.

A code is showing on your unit

Enter the brand and the code. Cody explains what’s happening and what you can check yourself.

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Cody speaks your language French, English, Spanish, Italian, Portuguese, German…

Artificial intelligence

Cody, the assistant specialized in heat pump troubleshooting

Cody isn’t a search engine: it’s an artificial intelligence that understands your problem the way you describe it. Tell it “my Daikin shows E7 and it’s stopped heating” or simply “it’s been making a strange noise since yesterday.” It asks questions, guides you step by step, and knows when to stop and hand things over to a professional.

my daikin shows E7 and it’s stopped heating

The code E7 indicates a fan motor fault in the outdoor unit. It can no longer release heat, which is why heating has stopped.

✓Check that no leaves or branches are blocking the fan blade

✓Clear the area around the outdoor unit

✓Cut the power for 10 minutes, then turn it back on

One specialty onlyHeat pumps, reversible air conditioners, heat pump water heaters. Nothing else: that’s what makes its answers so precise.

It never makes things upEvery diagnosis is based on a verified database. When faced with an unknown code, it says so and looks it up in the manufacturer’s documentation.

It knows its limitsCircuit breaker, filters, water pressure: yes. Refrigerant circuit and electrical work: never. These tasks are reserved for a certified technician.

Available around the clockDay and night, weekends included, no sign-up and no waiting: ask your question the moment the problem happens.

Cody speaks your languageWrite to it in the language of your choice: it replies in the same language, with the same explanations and the same safety advice.

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No code showing? Describe the problem

Click on the situation that matches yours, and Cody takes it from there.

My heat pump has stopped heating It’s making an unusual noise It keeps going into safety mode The outdoor unit is covered in frost The circuit breaker keeps tripping There’s a water leak under the unit No more hot water It runs constantly

Find your code by brand

From major retailers to specialized manufacturers.

Airwell Ariston Atlantic Bosch Carrier Chaffoteaux Daikin De Dietrich Fujitsu Gree Heiwa Hitachi LG Midea Mitsubishi Electric Mitsubishi Heavy Panasonic Samsung Saunier Duval Stiebel Eltron Technibel Thermor Toshiba Vaillant Viessmann

Most searched codes

7H · Daikin — water flow L3 · Mitsubishi Electric — water flow H20 · Panasonic — water flow 06 · Atlantic — high pressure F.022 · Saunier Duval — water pressure too low F75 · Vaillant — circuit pressure 06 · Hitachi — high pressure CH21 · LG — high pressure E351 · Samsung — high pressure H.02.07 · De Dietrich — water pressure E03 · Toshiba — high pressure 11 · Fujitsu — high pressure

Frequently asked questions

Can I repair a heat pump myself?Some things, yes: resetting a circuit breaker, cleaning a filter, restoring water pressure, clearing the outdoor unit. Anything involving the refrigerant circuit or the unit’s electrical system is prohibited without a certified refrigerant handling qualification: in France, this is a legal requirement, not just a sales precaution.

The code disappears when I restart it, is it fixed?Rarely. A power cut clears the display but not the underlying cause. If the code comes back after a few hours or a few days, the fault is real and will get worse. Note how often it happens: that’s the most useful information for the technician.

How much does a repair cost?In France, a service call with diagnosis generally costs between 90 and 180 €. A sensor replacement runs 150 to 300 €, a circulator pump 300 to 600 €, and a compressor often exceeds 1,500 € including installation. Each guide gives the price range for the specific fault.

Is Cody free?Yes, no sign-up required. The site is funded by advertising.

Understanding a heat pump error code

An error code isn’t a breakdown in itself: it’s a safety feature. The unit detects an abnormal value — a pressure, a temperature, a flow — and shuts down before damage occurs. The code tells you which safety feature was triggered, not always why.

That’s why the same code often has several causes. A water flow fault can come from a clogged filter just as easily as from a worn-out circulator pump or a valve that stayed closed. The first two can be checked in a few minutes, the third requires a professional.

Each guide on this site follows the same logic: what the code indicates, the causes ranked from most to least likely, what you can safely check yourself, and the exact point at which you should stop and call someone.

Found a mistake in a guide? Report it, and we’ll fix it.

On video

See the issue before taking anything apart

Simple checks explained with pictures: water pressure, filters, defrosting, circulator pump. What you can do yourself, and what requires a refrigeration technician.

Watch the channel