2.F Service function 2.F - temporary test operating mode

What the display is showing

Temporarily forces output: 00 normal, 01 holds minimum output for 15 minutes, 02 holds maximum output for 15 minutes. The display reads 2.F while it is active and the boiler goes back to normal after 15 minutes or when the function is aborted.

Applies to: Greenstar ZBR/ZWB 21-42-3A wall-hung boilers and ZWB 28-42-3A combis

What to do

1. Open service functions with the service button, scroll with the key pad lock / ECO buttons
2. Select 2.F, choose 01 or 02, save

Models that show this code

4 models in Bosch Greenstar

Other codes on the same units

• 000-199 Supply temperature readout
• 2.C Service function 2.C - purging function
• 4.E Service function 4.E - appliance type detected
• 4.F Service function 4.F - trap filling routine
• 5.A Service function 5.A - reset service-due indication
• 6.A Service function 6.A - latest fault code
• 6.C Service function 6.C - target supply temperature from outdoor reset
• 6.b Service function 6.b - room control voltage at terminal 2