- Boilers
- Gas boiler
E07
Domusa E07 on an Avanttia NG gas boiler: safety thermostat trip
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
Domusa E07 is the temperature safety interlock: the Avanttia NG went above 100 °C and stopped the burner. Wait until the boiler temperature drops to 85 °C and press RESET once; if it comes back, switch the boiler off and call Domusa's official SAT.
Safety first
Stop and check this first
- Gas smell near the boiler with E07: ventilate by opening doors and windows, shut the main gas valve, keep the heating off and do not light flames or use electrical appliances. Domusa then says to notify your gas supplier, from outdoors and with everyone clear of the area.
- If E07 keeps returning, stop pressing RESET: Domusa asks you to switch the boiler off and call the official SAT whenever a lockout repeats.
Safe checks you can perform
- Wait for the boiler to cool to 85 °C
- One RESET, then watch
- Note the cold pressure on the gauge
- Error history in the Info menu
- Circulation and safety check by the SAT
Leave these tasks to a qualified professional
- Do not attempt this professional task: Check pumps and mixing valves
- Do not attempt this professional task: Test thermostats and safety devices
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Check pumps and mixing valves
What they doConfirms that circulation pumps and any mixing valves turn freely and are not blocked.
They must show youthe pump starting and water moving through the circuit.
In writingwhich part was blocked and what was done.
Test thermostats and safety devices
What they doVerifies that thermostats and control and safety devices respond correctly before any part is swapped.
They must show youthe test carried out on each device.
In writingthe result and the part replaced, if any.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Wait for the boiler to cool to 85 °C
- Who:
- you.
- How:
- leave the boiler alone and watch the boiler temperature on the display until it shows 85 °C or less.
- Result that matters:
- reaching the temperature Domusa requires before unlocking.
- If it already shows 85 °C or less:
- go on to RESET.
- If it stays above that for a long time:
- do not force anything and call the SAT.
- Evidence to keep:
- photo of the display with E07 and the temperature.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
One RESET, then watch
- Who:
- you.
- How:
- once the boiler is below 85 °C, press RESET a single time and watch for a while whether it heats normally again.
- Result that matters:
- knowing whether the lockout was a one-off or returns.
- If E07 returns:
- Domusa asks you to turn the boiler off and contact the nearest official SAT.
- If it runs normally:
- note the time in case it happens again.
- Evidence to keep:
- time of the unlock and what happened afterwards.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Note the cold pressure on the gauge
- Who:
- you.
- How:
- check the pressure on the digital gauge once the boiler is cold and compare it with the 1 to 1.5 bar range Domusa gives for the cold circuit.
- Result that matters:
- having a circuit reading for the technician.
- If it is outside that range:
- tell the SAT along with the E07.
- If it is within range:
- write it down anyway.
- Evidence to keep:
- photo of the digital gauge when cold.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Error history in the Info menu
- Who:
- you.
- How:
- open the Info menu by pressing the heating + button and RESET together until the circle completes, then step through codes AL 0 to AL 9 with the DHW buttons.
- Result that matters:
- knowing how often E07 has tripped and whether other codes came with it.
- If E07 repeats or shows with other errors:
- bring the list to the SAT.
- If it appears only once:
- keep it as a reference.
- Evidence to keep:
- photo of the AL codes.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Circulation and safety check by the SAT
- Who:
- technician from Domusa's official SAT.
- How:
- checks that pumps and mixing valves are not blocked, tests thermostats and safety devices and runs several operating cycles.
- Result that matters:
- finding why the boiler reached 100 °C.
- If a pump or valve is blocked:
- it is freed or replaced.
- If circulation is fine:
- the sensors and the safety thermostat are examined next.
- Evidence to keep:
- report with what was checked and replaced.
Domusa forbids access to sealed components and keeps maintenance for its authorised staff; inside are very hot water, mains voltage and the gas valve.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Boilers
- Brand
- Domusa Teknik
- Product type
- Gas boiler
Known code variants
- Avanttia NG E07
- caldera Domusa E07 sobrecalentamiento
- Candy dryer E07
- Candy dryer E7
- Candy dryer filters clogged E7
- Candy secadora E07
- Candy secadora E7
- Candy tumble dryer 7 flashes
- Domusa boiler E07 overheating
- Domusa E 07
- Domusa error E07
- Domusa safety thermostat error
- Domusa termostato de seguridad
- E 07
- E 7
- E-07
- E-7
- E07
- E7
- Error 7
- Error E07 Domusa
- secadora Candy 7 parpadeos
- secadora Candy filtros obstruidos E7
What it means
The Avanttia NG user guide (CDOC001980) describes E07 as the temperature safety interlock, and the alarm table calls it a safety thermostat error. It trips when the boiler exceeds 100 °C: E07 and the error symbol appear, the burner switches off and the installation stops receiving heat. To unlock it, wait until the boiler cools to 85 °C and press RESET. Other boilers from the brand may have a different code list. Seeing E07 does not by itself show that the thermostat or another part is broken.
Warnings and stop conditions
- Criticalsource verified
Gas smell near the boiler with E07: ventilate by opening doors and windows, shut the main gas valve, keep the heating off and do not light flames or use electrical appliances. Domusa then says to notify your gas supplier, from outdoors and with everyone clear of the area.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
- Highsource verified
If E07 keeps returning, stop pressing RESET: Domusa asks you to switch the boiler off and call the official SAT whenever a lockout repeats.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Symptoms and causes
Probable causes · in order
- Boiler water above 100 °CCommon
This is the trip Domusa describes: the control stops the burner as soon as boiler temperature goes past 100 °C.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
- Restricted water circulationPossible
In the yearly service Domusa requires circulation pumps and mixing valves not to be blocked; when water does not move, heat builds up in the boiler.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
- Thermostats or safety devicesPossible
Domusa's service list includes checking that thermostats and control and safety devices work properly; a wrong reading can also cause the lockout.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Virtual technician
Does E07 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Domusa Teknik Avanttia NG, guía rápida de funcionamiento para el usuario (CDOC001923)
Domusa Teknik · 2020 · manual
- 2
Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Domusa Teknik · 2020 · manual
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