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Bosch Error Code Running readout: Running – compressor frequency shown (Heat Pump)

Updated · by Aurora Star Tech Inc.

Bosch error code Running readout on a heat pump means: Running - compressor frequency shown. It is also called Bosch diagnostic code Running readout.

Low severityHeat PumpBosch IDS Light · Bosch IDS Premium Connected

Homeowner? What Bosch code Running readout means for you

Usually minor Your heat pump is reporting: Running - compressor frequency shown. This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.

Safe things you can check yourself

  • Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
  • Check both breakers and the outdoor disconnect box beside the outdoor unit; all should be ON.
  • Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
  • In winter, keep snow and ice off and away from the outdoor unit. A short defrost cycle with steam is normal.
  • Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.

Call (647) 657-2977Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Bosch error code Running readout mean?

While the compressor is running, the two numeric digits show the compressor operating frequency in Hz. Normal. If a protection is active, a letter comes first and the number after it is still the frequency.

Applies to: BOVA IDS Premium Connected (36-60) and IDS Light (BOVA15) heat pumps

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Bosch models that use code Running readout

BOVA15-24BOVA15-36BOVA15-60BOVA36-20BOVA60-20

Other Bosch Heat Pump codes

CodeMeaning
P11High pressure protection (transducer)
P21Low pressure protection
P31Input over-current protection
P32Compressor over-current protection
PHLow discharge superheat protection
Protection letter + HzLimited operation - protection letter before the frequency
Standby readoutStandby - outdoor ambient temperature shown

All Bosch Heat Pump error codes →

Bosch code Running readout: homeowner questions

What does Bosch code Running readout mean?

Running - compressor frequency shown. While the compressor is running, the two numeric digits show the compressor operating frequency in Hz. Normal. If a protection is active, a letter comes first and the number after it is still the frequency.

Is it safe to keep using my heat pump with code Running readout?

Usually yes. Code Running readout is normally minor, but if it keeps coming back have it checked.

Can I reset Bosch code Running readout myself?

You can try one reset (power off for 30 seconds, then on). If Bosch code Running readout comes back, the cause is still there and a licensed technician should check it.

Who can fix Bosch code Running readout near me?

Aurora Star Tech Inc. repairs Bosch heat pumps in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air

Troubleshooting guides

Source: Bosch IDS Premium Connected BTC 762003301 D (02.2025), 18.9 System Protection Status Codes p.49 and 18.10 Parameter Point Check Table p.50; IDS Light BTC 762003308 D (01.2025), 17.9 p.43 and 17.10 p.44. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

Emergency HVAC Service

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