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Worcester Bosch Boiler Fault Codes

Locking Error

If there is a locking error, there will be a flashing fault code as well as a warning triangle and a static cause code. Pressing the reset button will be required to eradicate the fault.

 

Blocking Error   

If there is a blocking error, no data will be displayed but your boiler will stop operating. By pressing the return/spanner button, you will be able to find the cause code. If for example, the boiler is waiting for an action such as the cooling of an area, the error will automatically resolve once this is done.

 

Fault Error

A fault code is an alpha numeric code that will offer you an indication to the error by telling you the fault group.

 

Cause Error        

A cause error code will be a three digit number, found when locating the block error.

 

Maintenance Code

A maintenance code (beginning with H) will tell you when there is a situation that will not stop the boiler operating, but will need the attention of an engineer.

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FAULT CODE

9A
Cause

Boiler has been fitted with incorrect Heat Control Module (HTM).

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

9U
Cause

The code plug could be faulty or not properly connected.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

B7
Cause

You need to replace the control board.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

C6
Cause

The system is running too fast or too slow.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

D1
Cause

Sensor could be wet, damaged or disconnected. The boiler will block for 300 seconds

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

D1
Cause

Boiler is overheating.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

E2
Cause

The Flow sensor has shorted, is damaged or disconnected.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

E5
Cause

The primary flow sensor has overheated.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

E9
Cause

The main heat exchange has overheated as the main temperature is 150 degrees.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

E9
Cause

Maximum temperature sensor on the main heat exchange cannot be recognised or has failed.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

E9
Cause

The flue gas thermostat has overheated.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

EA
Cause

Failure after four ignition attempts. The boiler will wait 30 seconds before another attempt is made.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

EA
Cause

A flame has been extinguished due to either moisture in the sump, a blocked sump or strong wind in the flue.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

EA
Cause

Gas valve coil has been disconnected.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

EA
Cause

Flame has not extinguished within first 4 seconds of ignition.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

FAULT CODE

EA
Cause

There is an error as the pump is not detecting water. Check the pressure gauge and re-pressurise to 1 bar.

Solution

This needs to be dealt with by a gas engineer

Average Cost £90.00

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Poole

Dorset

BH14 9PW

07878 019 479

contact@rpplumbandheat.co.uk

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