Remeha Quinta 30 Fault codes & diagnostics

64 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

System Natural GasLPG 30 kW 2002-2010 Discontinued

Replaced by: Quinta Pro 30

Download the Remeha Quinta 30 manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Severity at a glance

Each cell = one fault code. Hover to identify.
38 High 8 Medium 18 Low

All 64 documented codes

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0!

Your boiler is perfectly healthy and is simply waiting for a signal from your thermostat or timer to start heating your home.

Low DIY-safe

What to check first

  1. Check your room thermostat is set to a higher temperature than the current room temperature
  2. Ensure your heating programmer or timer is set to the 'On' position
  3. Verify that your hot water cylinder thermostat is satisfied
00.

Your boiler is confused and thinks the flame is already lit before it has actually started, so it is refusing to fire up for safety reasons.

High Engineer only £150-250

Parts commonly replaced

  • Ionisation electrode
  • Gas valve
  • PCB

Related codes

0)

Your boiler is currently in standby mode and is working correctly because it has not been asked to provide any heating or hot water at this moment.

Low DIY-safe

What to check first

  1. Check your room thermostat or smart controller settings to ensure the target temperature is set higher than the current room temperature
  2. Ensure your heating programmer or timer is set to 'On' for the current time period
  3. Verify that your hot water cylinder thermostat is calling for heat if you have a system boiler
0*

Your boiler is perfectly healthy and is simply waiting for a signal from your thermostat or timer to start heating your home.

Low DIY-safe

What to check first

  1. Check your room thermostat is set to a temperature higher than the current room temperature
  2. Ensure your heating programmer or timer is set to the 'On' position
  3. Verify that your hot water demand is active if you are trying to heat the cylinder
0%

Your boiler is currently in standby mode and is working exactly as it should because it hasn't been asked to provide any heating or hot water right now.

Low DIY-safe

What to check first

  1. Check your room thermostat or smart controller settings
  2. Ensure your heating timer or programmer is set to 'On' or 'Timed'
  3. Turn up the target temperature on your thermostat to see if the boiler fires up

Related codes

0$

Your boiler is perfectly healthy and is simply waiting for a signal from your thermostat or timer to turn on your heating or hot water.

Low DIY-safe

What to check first

  1. Check your room thermostat is set to a higher temperature than the current room temperature
  2. Ensure your heating programmer or timer is set to 'On' for the current time period
  3. Verify that the boiler's own internal settings are not set to 'Summer' or 'Hot Water Only' mode

Related codes

1-2

Your boiler has detected an internal issue and is alerting you that it requires professional attention to identify the specific problem.

Medium Engineer only £120-250

Parts commonly replaced

  • Control board
  • Wiring harness
  • Sensor assembly

Related codes

1!

Your boiler is currently just running a routine safety check to clear out the system before it fires up, which is a normal part of the start-up process.

Low Engineer only
01.

Your boiler has detected an electrical fault in its internal wiring, which has caused it to shut down to prevent further damage.

High Engineer only £120-250

Parts commonly replaced

  • Control board
  • Wiring harness
  • External sensor

Related codes

Showing 11–20 of 64
1(

The boiler is currently preparing itself to ignite and is performing a standard safety check before it begins heating your home.

Low Engineer only
02.

Your boiler has failed to light the flame after repeated attempts to start up.

High Engineer only £150-350

Parts commonly replaced

  • Ionisation electrode
  • Ignition lead
  • Gas valve
  • Ignition transformer

Related codes

2(

Your boiler is currently trying to light its flame but is failing to do so after a few seconds of attempting.

High Engineer only £120-250

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Ignition transformer

Related codes

2*

Your boiler is failing to start because it cannot successfully ignite the burner, so it is shutting itself down as a safety precaution.

High Engineer only £150-300

Parts commonly replaced

  • Ignition electrode
  • Ionisation probe
  • Gas valve

Related codes

2$

Your boiler is currently trying to start up but is failing to detect a flame, meaning it cannot ignite to provide heat or hot water.

High Engineer only £150-300

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Ignition transformer

Related codes

03

Your boiler has detected an internal issue while trying to run and has paused its operation to protect itself.

High Engineer only £120-250

Parts commonly replaced

  • Control PCB
  • Ignition transformer
  • Sensor wiring harness

Related codes

Showing 21–30 of 64
04

Your boiler has detected an internal electrical problem and has safely shut itself down to prevent further damage.

High Engineer only £150-350

Parts commonly replaced

  • Control Unit (PCB)
  • Wiring Harness
  • Main Fuse
4)

Your boiler is struggling to switch between heating your radiators and heating your hot water tank, which may result in a lack of hot water.

Medium Engineer only £150-300

Parts commonly replaced

  • Three-way valve actuator
  • DHW pump
  • Diverter valve cartridge

Related codes

8-9

Your boiler is not receiving any electricity, which means the unit is completely shut down and cannot provide any heating or hot water.

High DIY-safe £120-250

What to check first

  1. Check your home's fuse box or consumer unit to see if a trip switch has been triggered.
  2. Verify that the fused spur switch connected to the boiler is turned on.
  3. Check the fuse inside the boiler's fused spur and replace it if it has blown.

Parts commonly replaced

  • Main circuit board (PCB)
  • Internal wiring harness
  • Transformer
08.

Your boiler is struggling to breathe because the vents or internal airways are blocked, preventing it from safely exhausting fumes.

High Engineer only £150-300

Parts commonly replaced

  • Air pressure switch
  • Fan assembly
  • Venturi tube
  • Flue seals
10

Your boiler’s internal computer has developed a serious electronic fault and can no longer control the heating safely.

High Engineer only £350-£550

Parts commonly replaced

  • Control Box (PCB)
  • Communication module

Related codes

10-11

Your boiler has detected that a safety valve is not opening or closing correctly, which means it cannot safely regulate the internal water flow or gas pressure.

High Engineer only £180-300

Parts commonly replaced

  • Gas valve
  • Gas valve stepper motor
  • Gas valve harness

Related codes

12.

Your boiler has stopped working because an internal safety fuse has blown, meaning the control system cannot power up.

High Engineer only £120-250

Parts commonly replaced

  • 3.15A T internal fuse
  • Control unit PCB

Related codes

Showing 31–40 of 64
13

Your boiler's internal computer has encountered a critical error and can no longer control the heating system safely.

High Engineer only £350-£650

Parts commonly replaced

  • Main Control PCB
  • Communication Cable

Related codes

14

Your boiler's internal computer has developed a serious communication fault and can no longer control the heating process safely.

High Engineer only £350-£550

Parts commonly replaced

  • Main PCB (Control Board)
  • External Controller Interface

Related codes

15

Your boiler’s internal computer has developed a serious electronic fault and can no longer control the heating process safely.

High Engineer only £350-£550

Parts commonly replaced

  • Main PCB (Control Board)
  • External interference suppressor
16

Your boiler's internal computer brain has developed a critical fault and is unable to manage the system safely.

High Engineer only £350-£550

Parts commonly replaced

  • Control Box (PCB)
  • Internal Wiring Harness

Related codes

17

Your boiler's main internal computer has developed a serious fault and is no longer able to manage the heating process safely.

High Engineer only £350-£550

Parts commonly replaced

  • Main PCB (Control Board)
  • Internal Fuse
18.

Your boiler has switched itself off because the water inside it has become dangerously hot, likely due to a blockage in the system or a pump failure.

High Engineer only £150-350

Parts commonly replaced

  • Central heating pump
  • Plate heat exchanger
  • Temperature sensor
19.

Your boiler has shut down because the water inside its pipes has become hotter than the system is designed to handle.

High Engineer only £120-250

Parts commonly replaced

  • NTC temperature sensor
  • Pump
  • Diverter valve
20-21

Your boiler has detected that it is running too hot and has automatically switched itself off to prevent potential damage.

High Engineer only £150-300

Parts commonly replaced

  • Overheat thermostat
  • Central heating pump
  • System filter
  • Heat exchanger

Related codes

24.

Your boiler is confused because it detects that the water flowing out is cooler than the water flowing in, which is the opposite of how it should be working.

High Engineer only £120-250

Parts commonly replaced

  • Flow temperature sensor
  • Return temperature sensor

Related codes

25.

Your boiler is overheating because it cannot move the hot water away fast enough, causing it to shut down to prevent damage.

High Engineer only £120-250

Parts commonly replaced

  • Central heating pump
  • Plate heat exchanger
  • Diverter valve

Related codes

Showing 41–50 of 64
28.

Your boiler has stopped working because the mechanical fan that pushes exhaust gases out of the flue cannot turn on.

High Engineer only £250-450

Parts commonly replaced

  • Fan assembly
  • Control PCB/Fuse
  • Transformer
29.

Your boiler's inner cooling fan is failing to turn off, which is usually caused by a loose wiring connection or a faulty communication signal within the unit.

Medium Engineer only £120-250

Parts commonly replaced

  • Fan unit
  • Control PCB
  • Wiring harness
30.

Your boiler has switched itself off because the water inside is not circulating correctly, causing a significant temperature difference between the water heading to your radiators and the water returning to the boiler.

High Engineer only £150-300

Parts commonly replaced

  • Central heating pump
  • Plate heat exchanger
  • System filter
31.

Your boiler has stopped working because a sensor that measures the water temperature is reporting an incorrect or impossible reading, causing the system to shut down for safety.

High Engineer only £150-250

Parts commonly replaced

  • Flow temperature sensor
  • Wiring harness
32.

Your boiler has stopped working because it cannot correctly read the temperature of the water returning to it from your radiators.

High Engineer only £120-200

Parts commonly replaced

  • Return temperature sensor
  • Wiring harness

Related codes

36.

Your boiler has stopped working because it can no longer accurately read the temperature of the water flowing through your heating system.

High Engineer only £120-220

Parts commonly replaced

  • Flow temperature sensor
  • Wiring harness

Related codes

37

Your boiler has stopped working because it cannot correctly measure the temperature of the water returning to the unit.

High Engineer only £120-190

Parts commonly replaced

  • Return temperature sensor (NTC)
  • Sensor wiring harness
37.

Your boiler has lost the ability to accurately measure the temperature of the water circulating back into it, so it has shut down as a precaution to prevent overheating.

High Engineer only £120-220

Parts commonly replaced

  • Return temperature sensor
  • Wiring harness
41

Your boiler's computer brain has malfunctioned and can no longer control the heating system safely.

High Engineer only £350-£550

Parts commonly replaced

  • Main Control PCB
  • Control Box Assembly
42

Your boiler's internal computer brain has experienced a critical error and can no longer control the heating system safely.

High Engineer only £350-£550

Parts commonly replaced

  • Main PCB (Control Board)
  • External Control Interface
Showing 51–60 of 64
43.

Your boiler's internal computer settings have become scrambled or corrupted, meaning it no longer knows how to run your heating system correctly.

High Engineer only £120-250

Parts commonly replaced

  • Main circuit board (PCB)
  • Control panel
60

Your boiler's computer brain has suffered an internal error and cannot communicate with the rest of the system.

High Engineer only £350-£580

Parts commonly replaced

  • Main PCB (Control Board)
  • External Control Interface

Related codes

61.

Your boiler has detected an issue with the airflow system which prevents it from safely igniting or operating.

High Engineer only £150-250

Parts commonly replaced

  • Air pressure switch
  • Venturi
  • Fan assembly

Related codes

975

Your boiler has temporarily stopped operating because it has detected a specific sequence of internal signals that don't match its safety checks.

Medium DIY-safe £100-350

What to check first

  1. Press the Reset button for two seconds
  2. Check that your external heating controls or room thermostat are calling for heat
  3. Ensure the boiler's power supply has not been interrupted

Parts commonly replaced

  • External controller
  • Electronic control board (PCB)

Related codes

980

Your boiler has paused because the water temperature has risen slightly faster than expected, causing the system to temporarily stop firing as a protective measure.

Low DIY-safe £0-120

What to check first

  1. Check that all radiator valves are open to ensure water can flow freely.
  2. Inspect the system pressure gauge and top up to 1.5 bar if it is low.
  3. Wait for the boiler to cool down, as it should restart automatically once the temperature drops.

Parts commonly replaced

  • None (usually a temporary state)
  • System Filter (cleaning)
  • Circulation Pump

Related codes

B@(

Your boiler has entered a standby mode and has temporarily stopped heating because it is waiting for a signal from your heating controls or external system.

Low Engineer only
B@*

Your boiler has entered a standby mode and is currently preventing itself from starting up until a specific system condition is met.

Medium Engineer only £120-250

Parts commonly replaced

  • External controls
  • Flow sensor
  • System thermostat

Related codes

B@%

Your boiler is overheating too quickly because water isn't moving through the system fast enough, causing it to take a ten-minute break to cool down.

Medium DIY-safe £100-280

What to check first

  1. Check that all radiator valves are fully open
  2. Ensure the central heating bypass valve is open
  3. Check that the boiler pressure is between 1.0 and 1.5 bar
  4. Bleed all radiators to remove trapped air

Parts commonly replaced

  • Central heating pump
  • Main heat exchanger (flushing)
  • Flow/Return temperature sensors

Related codes

b@^

Your boiler has temporarily paused because an external safety device or control switch has told it to stop running.

Medium DIY-safe £0-120

What to check first

  1. Check if any external safety devices, like a condensate pump or smoke alarm link, have been triggered
  2. Ensure your thermostat or timer is calling for heat correctly
  3. Wait 120 seconds to see if the boiler restarts automatically once the external signal resets

Parts commonly replaced

  • External controls wiring
  • Condensate pump
  • External thermostat

Related codes

b#

Your boiler has switched itself off because the water temperature is rising too quickly, usually due to poor water flow through the system.

High DIY-safe £120-350

What to check first

  1. Check that all radiator valves are fully open
  2. Ensure the central heating pump is running and hasn't seized
  3. Check that any external bypass valves are open

Parts commonly replaced

  • Circulating Pump
  • Flow/Return Temperature Sensors
  • Main Heat Exchanger (Flushing)

Related codes

Showing 61–64 of 64
B#)

Your boiler is overheating because water isn't moving through the system quickly enough, causing it to pause frequently to cool down.

Medium DIY-safe £100-350

What to check first

  1. Ensure all radiator valves and thermostatic valves are fully open
  2. Check that the central heating pump is running and hasn't seized
  3. Bleed all radiators to remove trapped air that may be blocking flow

Parts commonly replaced

  • Circulation Pump
  • Flow and Return Temperature Sensors
  • Central Heating Filter (Cleaning)

Related codes

B$#

Your boiler has entered a temporary safety shutdown mode because it has reached its target temperature or is waiting for a command from your heating controls.

Low DIY-safe

What to check first

  1. Check your room thermostat to ensure it is calling for heat
  2. Turn the boiler off and back on again using the main power switch
  3. Ensure your heating programmer timer is set to 'on'

Related codes

E1

Your boiler has lost its internal power supply to the main control board, which means it cannot operate your heating or hot water.

High Engineer only £150-300

Parts commonly replaced

  • Control unit
  • Transformer
  • Wiring harness

Related codes

E3

Your boiler has detected that it is overheating and has automatically shut itself down to prevent damage.

High Engineer only £150-300

Parts commonly replaced

  • Overheat Thermostat
  • Central Heating Pump
  • Diverter Valve
  • System Filter

Related codes

7 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.