null
Free shipping to USA and Canada on orders over $499

Worldwide Delivery

Free shipping to USA and Canada on orders over $499

24h-72h delivery

Espar Airtronic fault codes and Eberspacher Hydronic fault codes

When your Heater is acting up it will give out a fault code or error code to help you understand the problem. Find out what these codes mean and what you can do to remedy the problem. 

No matter whether it’s a connectivity issue, fuel shortage, incorrect connections, under or over voltage, heaters show fault codes that can narrow down your investigation. However multiple fault codes can even cause a heater-lockout. Below is a list of all Espar Airtronic and Hydronic fault codes with explanations and potential remedies.

To access and clear the fault codes visit the article below:

How to find Fault codes and clear them. Espar heater reset / Eberspacher heaters.

 


The heater has a fault that can only be repaired by a specialist.


Visit an authorised Eberspächer Workshop.


There are faults stored in memory


The heater control box was undervoltaged without interruption for at least 20 seconds.


Check the battery for a drop in voltage.


Charge battery or replace, if necessary.

Overvoltage applied at the

heater control box without

interruption for at least

20 seconds.

Check battery and replace, if

necessary.

Fault in the fuel supply or fuel

pump.

Check connection and cables for continuity, short circuit

and damage.

 Pull the plug off the metering pump

and inspect for damage.

 Check the fuel level in the fuel tank.

 If the fault cannot be remedied,

please contact Eberspächer Support.

With water heaters only: Water

temperature in the heater too

high.

Check the water pump for proper

function.

 Check the water circulation in the

water circuit.

 The heater can be reset to the delivery

condition by removing the heater

fuse.

 If the fault cannot be remedied,

please contact Eberspächer Support.

Installation instructions | EasyStart Pro

22.1000.35.2203.0A EN

With air heaters only: Air temperature

in the heater too high.

Check the air lines. Are air lines

clogged or kinked? Air all air louvres

free?

 The heater can be reset to the delivery

condition by removing the heater fuse.

 If the fault cannot be remedied, please

contact Eberspächer Support.

Overheating of the heater

detected. The heater is interlocked

for safety reasons.

The heater can be reset to the delivery

condition by removing the heater fuse.

 If the fault cannot be remedied, please

contact Eberspächer Support.

Emergency running of the heater.

There is a fault in the heater.

Restricted operation is still possible,

however (with air heaters with target

temperature 20°C).

 If the fault cannot be remedied, please

contact Eberspächer Support.

The external temperature sensor

is defective.

Check the wiring of the external

temperature sensor for continuity,

short-circuit or damage; replace the

temperature sensor, if necessary. If

the fault cannot be remedied, please

contact Eberspächer Support.

The internal temperature sensor

is defective.

There is no remedy for this fault. The

control unit has to be replaced.

The operating button is blocked.

Can the operating button be freed

again by hand? If the fault cannot be

remedied, please contact Eberspächer

Support.

The button is blocked.

Can the button be freed again by

hand? If the fault cannot be remedied,

please contact Eberspächer Support.

Data are missing for EasyStart

Pro for initial commissioning.

Disconnect EasyStart Pro from the

power supply and connect again. If

the fault cannot be remedied, please

contact Eberspächer Support.

Timer mode is not permitted

during ADR mode.

Terminate ADR mode and test timer

mode again. If the fault cannot be

remedied, please contact Eberspächer

Support.

The heater is in auxiliary heating

mode via Switching Plus and

cannot be operated via EasyStart

Pro during this time.

Terminate auxiliary heating mode via

Switching Plus.

Terminate auxiliary heating mode via

Switching Plus.

Inspect the wiring for cable breakages/

short-circuits. If the fault cannot

be remedied, please contact

Eberspächer Support.

Fault code

P000… for EasyScan

and TP 7.1 (if connected

via CAN)

(…) for TP 7 (LIN)

P000100 (071)

P000101 (072)

P000102 (073)

Error description



Overheating/air outlet sensor

– Interruption

– Short circuit

– Short circuit to battery (+)

Cause

 Remedial action


Check overheating sensor.

– Check cables for continuity, short circuit and damage.

– Unplug connector -XB2, measure resistance between cable BU (chamber 1)

and cable GN (chamber 2).

– Measured values see page 27, in case of deviating values –> renew

lead harness of heater.

P000110 (087)

P000111 (088)

P000112 (089)

Water/air inlet error

– Interruption

– Short circuit

– Short circuit to battery (+)

Note!

Fault code P000110 (087) and

P000111 (088) are displayed

only if

 the heater is in operation

 Temperature reached at water

outlet sensor at least 80 °C.

Check the water inlet sensor.

Check cables for continuity, short circuit and damage.

– Unplug connector -XB2, measure resistance between cable BU (chamber 1)

and cable GN (chamber 2).

– Measured values see page 27, in case of deviating values –> renew

lead harness of heater.

P00010A (051)

Cold blowing

– Timeout

The combustion chamber has not cooled sufficiently for a restart.

 Check whether hot combustion air is drawn in. If not –> check flame sensor,

see Fault code P000120 (064) and Fault code P000121 (065).

P000114 (014)

Possible risk of overheating

(implausible signal)

Note!

Fault code P000114 (014) is

displayed only if

 the heater is in operation

 Temperature reached at overheating

sensor at least 80 °C.

Temperature difference between the flame and overheating sensor is too large.

 For remedial action see Fault code P000115 (012).

 Check flame sensor.

– Unplug connector -XB4, measure resistance between cable BU (chamber 5)

and cable BU (chamber 6).

– Measured values see page 27, in case of deviating values –> renew

lead harness of heater.

P000115 (012)

Overheating

– Software threshold exceeded

Temperature at overheating sensor >125 °C

 Check air throughput

 Check overheating sensor

– Check cables for continuity, short circuit and damage.

– Unplug connector -XB4, measure resistance between cable RD (chamber 9)

and cable RD (chamber 10).

– Measured values see page 27, in case of deviating values –> renew

lead harness of heater.

P000116 (017)

Overheating

– Hardware threshold exceeded

Temperature at overheating sensor >130 °C

 For remedial action see Fault code P000115 (012).

 Check overheating sensor.

– Check cables for continuity, short circuit and damage.

– Unplug connector -XB4, measure resistance between cable RD (chamber 9)

and cable RD (chamber 10).

– Measured values see page 27, in case of deviating values –> renew

lead harness of heater.

P00011A (015)

Operating lock-out

– Too many overheating events

detected

The control box is locked due to too frequent consecutive overheating (Fault

code P000114 (014), Fault code P000115 (012)).

 For remedial action see Fault code P000114 (014), Fault code P000115 (012).

 Unlock control box, see Chapter 4.3, p. 13.

P000120 (064)

P000121 (065)

P000122

Flame sensor

– Interruption

– Short circuit

– Short circuit to battery (+)

Check flame sensor.

– Check cable for continuity, short circuit and damage.

– Unplug connector -XB2, measure resistance between cable BU (chamber 1)

and cable GN (chamber 2).

– Measured values see page 27,

in case of deviating values –> renew lead harness of heater.

 Further display Fault code P000120 (064) and Fault code P000121 (065)

–> replace control box, see Chapter 5.4.2, p. 23.

P000125 (057)

P000126 (053)

P000127 (054)

P000128 (055)

P000129 (056)

Flame cutout from start process

Flame cutout within the control

range

0% – 25%

Flame cutout within the control

range

25% – 50%

Flame cutout within the control

range

50% – 75%

Flame cutout within the control

range

75% – 100%

Note!

In case of flame cutout during

the start phase or in normal

operation the heater is restarted

(max. 3 times). If the restart was

successful, the fault code display

is deleted.

Check exhaust and combustion air system.

 Check fuel quantity and fuel supply, see Chapter 5.6, p. 34.

 Check flame sensor, see Fault code P000120 (064) and Fault code P000121

(065).

P00012A (052)

Safety time 1

– Exceedance

Check exhaust and combustion air system.

 Check fuel quantity and fuel supply, see Chapter 5.6, p. 34.

 Renew the fuel filter.

 Clean the fuel filter in the connection socket of the metering pump.

P00012B (050)

Operating lock-out, too many

safety timeouts

Following three unsuccessful start attempts the control box is locked.

 Unlock control box, see Chapter 4.3, p. 13.

 Check fuel quantity and fuel supply, see Chapter 5.6, p. 34.

P000130 (060)

External air inlet temperature

sensor (LEF2)

– Interruption

Test external air inlet sensor

 Disconnect the GYRD / BNWH plug-in connection of the external sensor and

measure the resistance value, diagram and table of values see page 13,

– if temperature sensor is ok, re-connect the GYRD / BNWH plug-in

connection.

 Disconnect connector XS12/XB12 at the heater and measure the resistance

value in connector housing XB12 between PIN 6 and PIN 12. If an interruption

occurs, the ohmic value is > 7175 Ω / > 3 kΩ.

 If resistance value is ok –> replace control box.

P000131 (061)

P000132

External air inlet temperature

sensor (LEF2)

– Short circuit

– Short circuit to battery (+)

Test external air inlet sensor

 Disconnect the GYRD / BNWH plug-in connection of the external temperature

sensor and measure the resistance value, diagram and table of values see

page 13,

– if ok, re-connect the GYRD / BNWH plug-in connection.

 Disconnect connector XS12/XB12 at the heater and measure the resistance

value in connector housing XB12 between PIN 6 and PIN 12. In case of short

circuit, the ohmic value is < 486 Ω / < 800 Ω.

 If the error P000131 (061) continues to be displayed –> replace control box.

P000143 (006)

Air pressure sensor

– Implausible signal

Delete error and try again.

 If error occurs again, replace control box.

P000200 (048)

P000201 (047)

Metering pump

– Interruption

– Short circuit

Check metering pump lead harness for continuity, short circuit and damage.

– Lead harness ok –> renew the metering pump.

P000202 (049)

Metering pump

– Short circuit to battery (+) or

transistor error

Check cables for continuity, short circuit and damage.

– Unplug the connector at the metering pump.

 Display Fault code P000200 (048) metering pump defective –> replace

metering pump.

P000210 (020)

P000211 (021)

P000212 (022)

Glow plug

– Interruption

– Short circuit

– Short circuit to battery (+) or

transistor error

Caution!

Damage to unit in case of

overvoltage

Voltage > 9.5 V irreparably damages

the glow plug.

 

P000213 (019)

Glow plug

– Ignition energy too low

Glow plug energy input is too low.

 Check cables for continuity, short circuit and damage.

 Test glow plug, see Fault code P000210 (020) to Fault code P000212 (022).

P000220 (031)

P000221 (032)

Electric motor

– Interruption

– Short circuit

Measure fan speed with EasyScan diagnostic tool, see EasyScan operating

instructions.

P000223 (033)

Burner motor

– Blocking

Impeller blocked (frozen, soiled, sluggish, ...).

 Remove blockage.

– Check electric motor for smooth and easy running by turning the impeller

manually.

Note!

In the case of the Airtronic D4L 24V, during running heating mode and simultaneous

motor start and undervoltage of the vehicle battery, in exceptional cases,

error message P000223 (033) can occur, although no valid faults exist.

 Delete faults using EasyScan and acknowledge in the control unit on

occurrence.

Further display Fault code P000300 (074)

 Renew fan, see Chapter 5.4.10, p. 28.

P000260

P000261

P000262

Universal output

– Interruption

– Short circuit

– Short circuit to battery (+) or

transistor error

Test universal output.

 Test WHRD conductor for continuity, short circuit and damage.

 If cable ok –> replace control box.

P000300 (074)

Overheating detection

Metering pump hardware or

cutout circuit defective

Test air outlet sensor.

– Check cables for continuity, short circuit and damage.

– Unplug connector XB4, measure resistance between cable RD (chamber 9)

and cable RD (chamber 10).

– Measured values see page 27,

in case of deviating values –> renew lead harness of heater.

 Further display Fault code P000300 (074) –> replace lead harness of the

heater.

 Unlock control box, see Chapter 4.3, p. 13..

P000301 (090)

P000302 (090)

Watchdog reset

Too many watchdog resets

Delete errors, the heater remains ready for operation.

 Replace control box, see Chapter 5.4.2, p. 23

P000303 (099)

Operating lockout: Too frequent

output stage errors

Replace control box, see Chapter 5.4.2, p. 23

P000304 (091)

Too many resets (loose contact)

Replace control box, see Chapter 5.4.2, p. 23

P000305 (095)

Control box not calibrated

Replace control box, see Chapter 5.4.2, p. 23

P000306 (098)

Second cutout circuit is defective

Replace control box, see Chapter 5.4.2, p. 23

P000307 (081)

CAN communication error in

control unit

 

P00030A

communication error

Delete error. Heater remains ready for operation.

P000310 (010)

P000311 (010)

Control box cutout due to

overvoltage

Heater cutout due to overvoltage

Note!

Heater is not functioning.

Overvoltage applied at the control box without interruption for at least

20 seconds.

 Unplug connector -XB1 at the heater.

 Start the vehicle engine.

 Measure voltage between cable RD (chamber 1) and cable BN (chamber 2).

– Airtronic 12 volt – voltage > 16 V –> check generator controller

– Airtronic 24 volt – voltage > 32 V –> check generator controller

– Check the battery.

P000312 (011)

P000313 (011)

Control box cutout due to

undervoltage

Heater cutout due to undervoltage

Note!

Heater is not functioning.

Undervoltage applied at the control box without interruption for at least

20 seconds.

 Unplug connector -XB1 at the heater.

 Start the vehicle engine.

 Measure voltage between cable RD (chamber 1) and cable BN (chamber 2).

– Airtronic 12 volt – voltage < 10 V –> check generator controller

– Airtronic 24 volt – voltage < 21 V –> check generator controller

– Check the fuses, the supply cables, the ground connections and the positive

terminal post at the battery for voltage drop (corrosion).

P000330 (092)

ROM error

Replace control box, see Chapter 5.4.2, p. 23

P000331 (093)

RAM error

Replace control box, see Chapter 5.4.2, p. 23

P000332 (094)

NVMEM error (EEPROM,

DataFlash)

Replace control box, see Chapter 5.4.2, p. 23

P000342

Invalid configuration

Check ADR coding.

P000394

ADR button

– Short circuit