HVACopedia

Viessmann · Boiler

P.1 Service interval reached

Menu / mode display Vitodens 200-W B2HE

What the display is showing

Service message: the set interval until next maintenance has elapsed.

Applies to: Vitodens 200-W B2HE 85, 120, 150, 199

What to do

  1. After servicing, set parameter 1411.0 'Clear maintenance messages' to ON (System configuration > Boiler).
  2. An acknowledged but unreset service message returns the following Monday.

Models that show this code

4 models in Vitodens 200-W B2HE

B2HE-120B2HE-150B2HE-199B2HE-85

Other codes on the same units

  • F.94 PlusBus voltage error
  • I.56 External demand active
  • I.57 External blocking active
  • I.59 Parameters restored
  • P.4 Top up heating water
  • P.8 Service due after burner hours
  • S.154 Internal flow switch open
  • S.60 Summer mode active

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

Source: Viessmann Vitodens 200-W B2HE 85/120/150/199 Service Instructions 6167 813-24 (09/2026), Further messages, p.74. Summarized in our own words; check the original manual for your model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.