- Boilers
- Gas boiler
110
Chaffoteaux 110 on a gas boiler: heating flow NTC sensor
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
Chaffoteaux 110 (flashing as ERROR / 110 or 1 10) is a volatile safety stop for an open or short-circuited heating flow NTC sensor. Wait briefly to see if it clears itself; if it stays, turn the boiler off, set the external switch to OFF, close the gas tap and call a technician.
Safety first
Stop and check this first
- If you detect a strong smell of gas, smell burning or see smoke from the appliance: do not operate electrical switches or create sparks, close the main gas shut-off valve, open the windows, leave the building and call your gas emergency service and a qualified technician from outside.
- Never open the boiler casing to access the flow sensor or PCB (230 V electrocution and burn hazard), and remember that if the flow NTC sensor is open or power is switched OFF in freezing weather (below 8 ºC or 0 °C), the burner will not light for anti-freeze protection.
Safe checks you can perform
- Watch whether the volatile ERROR / 110 safety stop clears automatically
- Check the heating flow temperature reading with the INFO button
- Switch off the boiler, external bipolar switch and gas tap if 110 persists
Leave these tasks to a qualified professional
- Do not attempt this professional task: Electrical test of the heating flow NTC probe and blue (Bl) harness
- Do not attempt this professional task: Diagnostic check of parameters 8 3 1, 8 3 2 and 8 6 0 and original sensor replacement
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.
Electrical test of the heating flow NTC probe and blue (Bl) harness
What they doWith the external bipolar switch set to OFF and the gas valve closed, the technician removes the front casing, swings the electrical box forward and tests heating flow probe 1 (blue wires, Bl) and the primary heat exchanger probes for open circuit, short circuit or connector corrosion.
They must show youthe multimeter resistance and continuity readings on the flow NTC probe and its blue (Bl) harness plug.
In writingcode 1 10 diagnosed, whether the fault was an open circuit or short circuit, and the sensor resistance measured.
Diagnostic check of parameters 8 3 1, 8 3 2 and 8 6 0 and original sensor replacement
What they doUsing installer access code 234, the engineer checks parameters 8 3 1 (measured heating temperature), 8 3 2 (return temperature) and 8 6 0 (last 10 errors from Err 0 to Err 9), replaces the defective NTC sensor or lead with an original Chaffoteaux spare part and verifies heating and anti-freeze control.
They must show youa stable live flow temperature in parameter 8 3 1 with ERROR / 110 cleared and the old part if replaced.
In writingthe original Chaffoteaux spare part reference fitted, the readings in 8 3 1 and 8 3 2, and the post-repair test result.
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.
Watch whether the volatile ERROR / 110 safety stop clears automatically
- Who:
- you, observing the control panel display (4) without pressing RESET.
- How:
- check the screen: during a volatile safety stop, ERROR and 110 flash alternately alongside the warning triangle and wrench symbol (technical assistance request). Wait a few minutes without pressing RESET (which only applies to non-volatile lockouts) to see if the boiler resumes normal operation on its own.
- Result that matters:
- determine whether the fault was a brief contact glitch or a persistent open/short circuit.
- If ERROR / 110 clears by itself:
- note the time and still mention the intermittent code at your next service visit.
- If ERROR / 110 remains on the display:
- check the INFO menu and then carry out the safe shutdown steps.
- Evidence to keep:
- clear photo of the display flashing ERROR and 110 with the wrench and warning icons.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario · Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
Check the heating flow temperature reading with the INFO button
- Who:
- you, using the INFO (10) and Esc (6) buttons on the front panel.
- How:
- press the INFO button to step through the user information screens and look at the heating flow temperature (°C) reading; press Esc afterwards to return to the main screen, and also check that cold pressure on the gauge (7) is between 0,6 and 1,5 bar.
- Result that matters:
- record whether the control panel can display a plausible flow temperature while 110 is active.
- If an unusual temperature or blank reading appears in INFO:
- write it down for the technician.
- If the screen only flashes ERROR / 110 continuously:
- proceed directly to shutting the appliance down safely.
- Evidence to keep:
- photo or note of the INFO screen reading and the cold manometer pressure.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
Switch off the boiler, external bipolar switch and gas tap if 110 persists
- Who:
- you, using the ON/OFF button, the external wall switch and the gas tap.
- How:
- follow the exact Chaffoteaux user manual instruction for a safety stop that does not clear: press ON/OFF (1) to turn the boiler off, set the external bipolar electrical switch to OFF, close the gas shut-off valve and call a qualified technician.
- Result that matters:
- leave the boiler safely isolated without opening the casing.
- If outdoor or room temperatures risk dropping below 8 ºC or 0 °C:
- tell the service centre urgently, as an open flow NTC sensor or power-off state prevents the burner from firing for anti-freeze protection.
- If weather is mild:
- leave the external switch at OFF and the gas valve closed until the technician arrives.
- Evidence to keep:
- note of when ERROR / 110 started and whether heating or hot water was running.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario · Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
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
- Chaffoteaux
- Product type
- Gas boiler
Known code variants
- 1 10
- caldera Chaffoteaux 110
- Chaffoteaux 1 10
- Chaffoteaux 110
- Chaffoteaux boiler 110
- Error 110 Chaffoteaux
- Pigma 110
- Pigma Advance 110
What it means
In the official Spanish manuals for the Chaffoteaux Pigma Advance (the official manuals for this model are in Spanish), code 1 10 in group 1 (main circuit) means an open circuit or short circuit on the heating flow sensor. Both manuals illustrate ERROR / 110 on the display as the example of a volatile safety stop: ERROR and 110 flash with the alert triangle and wrench icon, and the boiler restarts automatically once the cause disappears. If the flow NTC sensor is open, anti-freeze protection falls back to the return sensor and below 8 ºC only runs the pump without lighting the burner. The code alone never proves whether the sensor, its blue wire or the board is faulty.
Warnings and stop conditions
- Higheditorial warning
If you detect a strong smell of gas, smell burning or see smoke from the appliance: do not operate electrical switches or create sparks, close the main gas shut-off valve, open the windows, leave the building and call your gas emergency service and a qualified technician from outside.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario · Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
- Mediumsource verified
Never open the boiler casing to access the flow sensor or PCB (230 V electrocution and burn hazard), and remember that if the flow NTC sensor is open or power is switched OFF in freezing weather (below 8 ºC or 0 °C), the burner will not light for anti-freeze protection.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario · Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
Symptoms and causes
Probable causes · in order
- Open circuit or short circuit in the heating flow NTC sensorCommon
Chaffoteaux's fault table directly defines code 1 10 as an open circuit or short circuit in the main circuit heating flow temperature sensor.
Evidence: Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
- Loose plug or damaged blue (Bl) wiring harness to the main boardPossible
On the Pigma Advance wiring diagram, heating flow probe 1 connects via blue (Bl) leads to the main PCB; a loose terminal, moisture or pinched insulation produces an open or shorted signal.
Evidence: Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
- Intermittent contact causing the volatile safety stop to come and goPossible
Because 110 is a volatile safety stop rather than a non-volatile lockout, a marginal contact on the probe can make ERROR / 110 flash and then clear on its own as temperatures change.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario · Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
- Faulty sensor input channel on the main electronic control boardLess common
If the flow NTC probe and its blue wiring harness test within specification for resistance and continuity, the fault lies in the sensing circuit on the main PCB.
Evidence: Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
Virtual technician
Does 110 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
Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
Chaffoteaux · 2018 · manual
- 2
Chaffoteaux Pigma Advance 25, 30 y 35, instrucciones de instalación y de utilización
Chaffoteaux · 2019 · manual
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