Trane · Air handler

E18 Blower communication failure on the control side

High severity Trane P0V0

What the control is telling you

The control side of the blower communication link has failed.

Applies to: Trane P0V0 modular blowers (P0V0A/B/C/D)

Likely causes

Communication harness fault
IMBC fault

Test and repair steps

Re-seat the motor communication harness.
Cycle power.
If it returns, replace the IMBC.

Settings for these units

Return filter size by cabinet width · Trane P0V0

Cabinet width	Filter
14-1/2 in.	1 - 14 x 25 x 1 in.
17-1/2 in.	1 - 16 x 25 x 1 in.
21 in.	1 - 20 x 25 x 1 in.
24-1/2 in.	1 - 24 x 25 x 1 in.

No filter inside the unit - remote/duct filter required.

Over 1600 CFM needs dual returns.

Models that show this code

4 models in Trane P0V0

P0V0A000M30SCAP0V0B000M40SCAP0V0C000M50SCAP0V0D000M50SCA

Other codes on the same units

E01 Blower control (IMBC) internal failure
E6.1 120 V polarity reversed
E6.2 Ground not detected
E12 Control fuse open
E13 Blower HP / OEM ID mismatch
E14 No personality module and local copy bad
E15 Unit data file corrupt in module and control
E17 Blower motor not responding

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: Trane 18-GE20D1-1E-EN (P0V0 installer's guide) - section IMBC Display Codes, Error Codes. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

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.