Atag E32S Fault codes & diagnostics

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

System Natural Gas 32 kW 2015-2022 Discontinued
GC Numbers 41-310-1241-310-13

Replaced by: iC Economiser Plus

Download the Atag E32S 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.
28 High 4 Medium

All 32 documented codes

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00

Your boiler is having difficulty successfully lighting the internal flame required to heat your home's water.

High Engineer only £150-300

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Flame rectification probe

Related codes

01

Your boiler has detected an electrical fault in its internal control system that is preventing it from operating safely.

High Engineer only £180-350

Parts commonly replaced

  • Control board
  • Wiring harness
  • External sensor

Related codes

02

Your boiler is failing to light the internal flame needed to produce heat and hot water.

High Engineer only £150-350

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Ignition transformer

Related codes

04

Your boiler has encountered a general internal processing error and has shut down as a safety precaution to prevent further issues.

High Engineer only £150-300

Parts commonly replaced

  • Main control board
  • Wiring harness

Related codes

05

Your boiler's internal computer has encountered a serious internal error and cannot safely operate, meaning your heating and hot water will not work.

High Engineer only £250-450

Parts commonly replaced

  • Main Control PCB
  • Wiring harness

Related codes

12

Your boiler has stopped working because an internal safety fuse has blown, which prevents the electronic control board from receiving the power it needs to function.

High Engineer only £120-200

Parts commonly replaced

  • 3AT fuse
  • Control PCB

Related codes

19

Your boiler's main computer has detected a serious internal communication error and has safely shut down to prevent further damage.

High Engineer only £250-450

Parts commonly replaced

  • Main Control Board
  • Wiring Harness

Related codes

28

Your boiler has stopped working because it cannot detect that the internal fan, which is essential for venting waste gases safely, is spinning correctly.

High Engineer only £180-350

Parts commonly replaced

  • Fan assembly
  • Wiring harness
  • Printed Circuit Board (PCB)

Related codes

60

Your boiler's internal settings have become misconfigured, preventing it from knowing how much power to use to heat your home safely.

High Engineer only £120-250

Parts commonly replaced

  • Main PCB

Related codes

67

Your boiler has detected an unusual temperature difference between its internal pipes while it is turned off, causing it to pause operation until it stabilises.

Medium Engineer only £120-250

Parts commonly replaced

  • Flow temperature sensor
  • Return temperature sensor
  • Main PCB

Related codes

Showing 11–20 of 32
80

Your boiler has automatically shut down because the exhaust gases getting rid of the fumes are running much hotter than they should be.

High Engineer only £150-300

Parts commonly replaced

  • Flue gas sensor
  • Primary heat exchanger
  • Pump

Related codes

81

Your boiler has detected that a key safety sensor measuring exhaust gases has become disconnected, so it has safely shut itself down to prevent operation.

High Engineer only £120-220

Parts commonly replaced

  • Flue gas sensor
  • Wiring harness

Related codes

82

Your boiler has detected an electrical fault in a sensor that monitors the exhaust gases, so it has automatically shut down to stay safe.

High Engineer only £150-250

Parts commonly replaced

  • Flue gas sensor
  • Wiring harness

Related codes

85

Your boiler is struggling to detect water moving through the system and has paused to clear out any trapped air bubbles.

Medium Engineer only £120-250

Parts commonly replaced

  • Central heating pump
  • Flow sensor
  • System pressure gauge

Related codes

86

Your boiler is struggling because the electricity supply from your home's wall socket is unstable or outside of the standard frequency range.

Medium Engineer only £120-250

Parts commonly replaced

  • Printed Circuit Board (PCB)

Related codes

Block 60

Your boiler has lost its specific 'tuning' settings which control how much power it should use, preventing it from starting up correctly.

High Engineer only £120-250

Parts commonly replaced

  • Control Board (PCB)
  • Internal configuration memory
Block 67

Your boiler has detected a temperature difference between its internal pipes while it is turned off, causing it to temporarily pause for safety.

Medium Engineer only £120-250

Parts commonly replaced

  • Flow sensor
  • Return sensor
  • NTC thermistor
Block 80

Your boiler has switched itself off because the waste gases exiting the flue are dangerously hot, indicating your system is struggling to vent heat properly.

High Engineer only £150-350

Parts commonly replaced

  • Flue gas sensor
  • Primary heat exchanger
  • Pump

Related codes

Block 81

Your boiler has stopped working because a sensor that monitors the exhaust gases has become disconnected.

High Engineer only £120-200

Parts commonly replaced

  • Flue gas sensor
  • Wiring harness

Related codes

Block 82

Your boiler has detected a faulty sensor that monitors exhaust fumes, so it has purposefully shut down for safety reasons until the part can be replaced by a qualified engineer.

High Engineer only £150-250

Parts commonly replaced

  • Flue gas temperature sensor

Related codes

Showing 21–30 of 32
Block 85

Your boiler is struggling to detect water moving through its system and is currently running a self-clearing cycle to flush out trapped air.

High Engineer only £120-250

Parts commonly replaced

  • Central heating pump
  • Flow sensor
  • Diverter valve

Related codes

Block 86

Your boiler has detected that the electricity supply coming from your wall socket is unstable or outside of the standard frequency range, preventing it from operating safely.

High Engineer only £120-250

Parts commonly replaced

  • Electrical supply wiring
  • PCB

Related codes

Error 00

Your boiler is struggling to light its internal flame properly, meaning it cannot produce heat or hot water reliably.

High Engineer only £150-300

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Flame rectification probe
Error 01

Your boiler has detected an electrical fault in its internal control system that is preventing it from operating safely.

High Engineer only £150-300

Parts commonly replaced

  • Main PCB
  • Wiring harness

Related codes

Error 02

Your boiler has stopped working because it cannot light the internal flame needed to heat your water and home.

High Engineer only £150-350

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Flame rectification probe

Related codes

Error 04

Your boiler has detected an internal fault that is preventing it from operating, which usually indicates an issue with the electrical system or the main circuit board.

High Engineer only £250-500

Parts commonly replaced

  • Control unit (PCB)
  • Wiring harness
  • Pressure switch

Related codes

Error 05

Your boiler's main computer brain is having a communication failure, which means the system cannot safely operate and has shut down.

High Engineer only £250-450

Parts commonly replaced

  • Main Control PCB
  • Wiring harness
Error 12

Your boiler has stopped working because a small internal fuse that protects its main control system has blown, cutting off the power needed for it to operate.

High Engineer only £120-220

Parts commonly replaced

  • 3A T-rated internal fuse
  • Control PCB
Error 19

Your boiler's computer has detected an internal communication failure, meaning it cannot safely operate or start up.

High Engineer only £250-450

Parts commonly replaced

  • Main Control Board
  • Wiring Harness
Error 28

Your boiler is unable to confirm that its built-in fan is spinning correctly, so it has safely shut down to prevent unsafe operation.

High Engineer only £180-350

Parts commonly replaced

  • Fan assembly
  • Wiring harness
  • Printed Circuit Board (PCB)
Showing 31–32 of 32
FILL

Your boiler has stopped working because the water pressure inside the system is too low to run safely.

High DIY-safe

What to check first

  1. Locate the external filling loop, usually a small silver braided hose with one or two valves located underneath the boiler.
  2. Gradually open the valve(s) to let water into the system until the pressure gauge on the front of the boiler reads between 1.0 and 1.5 bar.
  3. Close the valve(s) tightly to stop the flow of water.

Parts commonly replaced

  • Filling loop
  • Pressure sensor
  • Pressure relief valve
HIGH

Your boiler has detected that the water pressure in your heating system is too high, which could cause a leak or damage if not addressed.

High DIY-safe

What to check first

  1. Locate a radiator in your home, preferably upstairs.
  2. Place a cloth and a container under the radiator bleed valve.
  3. Use a radiator key to slightly open the valve and let a small amount of water out until the pressure gauge on the boiler drops to between 1 and 1.5 bar.

Parts commonly replaced

  • Pressure relief valve
  • Pressure sensor

1 operating states & engineer diagnostics

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