mypros+
Error code reference

Electrolux Oven Error Code bCoM

Communication impossible with PMACS channel

Electrolux codesElectrolux oven codes

Communication impossible with PMACS channel - one of the panel keys is permanently blocked. Blocks machine.

MyPros+ Max

Get the full diagnostic procedure for bCoM.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What bCoM means on a Electrolux oven

The bCoM error code on an Electrolux oven indicates a communication failure between the control board and the PMACS (Panel Management and Control System) channel. Specifically, the fault is triggered when one or more keys on the control panel become permanently or continuously activated, creating a stuck-signal condition that the PMACS interprets as an unresolvable communication error. When this fault is detected, the oven is fully blocked and will not operate until the underlying issue is resolved.

The PMACS channel is responsible for translating physical key presses on the user interface panel into digital commands that the main control board can execute. If a key contact becomes mechanically jammed, a membrane layer collapses and bridges a circuit permanently, or moisture or debris causes a continuous electrical contact, the PMACS registers an unending input signal. This constant signal state is outside the expected communication protocol and causes the system to lock out all oven functions as a protective measure.

Common contributors to this fault include physical damage to the control panel, liquid ingress behind the touch membrane or keypad, and degraded or failed ribbon cable connections between the user interface board and the main control board. Because the oven is fully blocked when this error is active, normal cooking operations cannot resume until the stuck key condition is identified and corrected, which often requires inspecting or replacing the user interface panel assembly.

Source: manufacturer service documentation.

Common causes of bCoM

  1. 01

    Stuck or jammed control panel key

    Wiring / connection

    A physical button or touch key on the control panel may be mechanically stuck in the depressed position due to debris, damage, or wear. Visually inspect each key for resistance, deformation, or foreign material lodged around it.

  2. 02

    Moisture or liquid intrusion under the keypad

    Part replacement

    Liquid that has seeped beneath the control panel membrane can bridge key contacts and create a permanent electrical signal. Look for water stains, residue, or corrosion around the panel edges and behind the user interface board.

  3. 03

    Failed or damaged user interface board

    Part replacement

    The user interface board itself may have a failed component or a shorted trace that simulates a continuously pressed key. If the panel shows no physical damage and the error persists after drying, the board likely needs replacement.

  4. 04

    Damaged or loose ribbon cable connection

    Part replacement

    The ribbon cable connecting the user interface panel to the main control board can become partially unseated, kinked, or torn, causing erratic or permanent signal states on one or more channels. Inspect the ribbon cable and its connectors at both ends.

  5. 05

    Main control board fault

    Part replacement

    In less common cases, the main control board may misinterpret signals from the PMACS channel due to its own internal failure. This is typically considered only after the user interface panel and cabling have been ruled out.

See the test procedure for each cause

Frequently asked questions about bCoM

What does bCoM mean on a Electrolux oven?
The bCoM code means the oven has detected a communication failure on the PMACS channel because one of the control panel keys is registering as permanently pressed or stuck. This causes the oven to block all operations as a protective measure. The fault will persist until the stuck key condition is identified and corrected.
Can I reset a bCoM error to get my Electrolux oven working again?
Cutting power to the oven at the breaker for several minutes may temporarily clear the error display, but if a key is physically stuck or a panel component has failed, the code will return as soon as the oven restores communication with the PMACS channel. A reset alone is unlikely to provide a lasting fix without addressing the underlying cause.
Is it safe to use my Electrolux oven while the bCoM error is showing?
No. When the bCoM error is active, the oven is fully blocked and will not allow normal cooking functions to operate. This lockout is intentional and prevents the oven from running in an uncontrolled state. Do not attempt to bypass the fault or use the oven until the issue is resolved.
How do I fix the bCoM error on my Electrolux oven?
Start by inspecting the control panel for any visibly stuck, damaged, or debris-blocked keys and clear any obstructions. If no physical jam is found, check for signs of moisture intrusion behind the panel. If the error persists, the user interface board or the ribbon cable connecting it to the main control board may need to be replaced, and in some cases the main control board itself is at fault.
How much does it cost to repair a bCoM error on an Electrolux oven?
Repair costs depend on which component has failed. A user interface panel or keypad assembly typically ranges from around $80 to $200 or more for parts, while a main control board can range from $150 to $350 or higher. Adding professional labor costs will increase the total, and some straightforward repairs such as cleaning a stuck key or reseating a ribbon cable can be done at minimal cost.

Related Electrolux oven codes

All Electrolux oven codes
View all 186 Electrolux oven codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass