mypros+
Error code reference

Hotpoint Cooktop Error Code F19

Communication failure between VISUAL BOARD UART2 and EXTERNAL BOARD.

Hotpoint codesHotpoint cooktop codes

Communication failure between VISUAL BOARD UART2 and EXTERNAL BOARD.

First step from the service manual

Power off the appliance, wait 3 minutes and power it on.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for F19.

  • 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 F19 means on a Hotpoint cooktop

The F19 error code on a Hotpoint cooktop indicates a communication failure between the visual board's UART2 interface and the external board. UART (Universal Asynchronous Receiver-Transmitter) is a serial communication protocol used to pass control signals and data between the cooktop's internal circuit boards. UART2 specifically refers to a secondary serial communication channel on the visual board, which handles the exchange of operational data with the external board responsible for managing outputs such as heating elements or burner controls.

This type of fault typically arises when the data signal between the two boards is interrupted, corrupted, or absent. Common causes include loose or damaged wiring harness connectors between the boards, a failed or failing visual board, a defective external board, or electrical interference caused by a power surge. In some cases, a temporary voltage irregularity in the supply line can disrupt the UART2 communication handshake, triggering the error without any permanent hardware damage.

Diagnosis should begin with a full power cycle: switch off the cooktop at the circuit breaker or unplug it, wait at least 3 minutes to allow capacitors to discharge and the boards to reset, then restore power. If F19 returns immediately or repeatedly, the next steps involve inspecting the wiring harness between the visual board and external board for loose pins, burnt contacts, or physical damage. If the wiring is intact, component-level testing or board replacement may be required.

Source: manufacturer service documentation.

Common causes of F19

  1. 01

    Temporary power fluctuation

    Wiring / connection

    A brief voltage spike or dip can interrupt the serial communication between boards without causing permanent damage. A 3-minute power reset often clears this condition.

  2. 02

    Loose or disconnected wiring harness

    Wiring / connection

    The connector linking the visual board's UART2 channel to the external board may have worked loose over time or through vibration. Inspect all connectors between the two boards for secure seating and signs of corrosion or bent pins.

  3. 03

    Damaged wiring harness

    Part replacement

    Physical damage to the communication wiring, such as fraying, pinching, or heat damage near burner areas, can break the signal path between the boards. Look for visible wear or discoloration along the harness routing.

  4. 04

    Faulty visual board

    Part replacement

    If the visual board's UART2 controller has failed internally, it will be unable to establish or maintain communication with the external board. This typically requires board replacement after ruling out wiring issues.

  5. 05

    Defective external board

    Part replacement

    The external board may have failed and can no longer receive or respond to signals from the visual board. If the visual board tests correctly and wiring is intact, the external board is the likely culprit.

See the test procedure for each cause

Frequently asked questions about F19

What does F19 mean on a Hotpoint cooktop?
F19 signals a communication failure between the visual board's UART2 interface and the external board on your Hotpoint cooktop. These two boards constantly exchange data to coordinate cooking functions, and when that communication breaks down, the cooktop displays F19. The fault can be caused by a power disruption, a loose wiring connection, or a failed circuit board.
Will resetting the cooktop clear the F19 error?
A reset will clear F19 if the root cause was a temporary power fluctuation or a brief communication glitch. Power off the cooktop, wait a full 3 minutes, then restore power. If F19 returns after the reset, there is likely a physical issue with the wiring harness or one of the control boards that requires further diagnosis.
Is it safe to use my Hotpoint cooktop while it shows F19?
It is not advisable to continue using the cooktop while F19 is active. A communication failure between control boards means the cooktop may not respond predictably to your inputs. Until the fault is diagnosed and resolved, the cooktop should remain off to avoid any unintended heating behavior.
How do I fix the F19 error on a Hotpoint cooktop?
Start by performing a 3-minute power reset at the circuit breaker. If the error persists, inspect the wiring harness connecting the visual board and external board for loose connectors, bent pins, or visible damage. If wiring checks out, the visual board or external board may need to be tested and replaced. A qualified technician can confirm which component has failed.
How much does it cost to repair a Hotpoint cooktop F19 error?
Repair costs vary depending on the root cause. If only a wiring connector needs reseating or a harness replacement is needed, costs are generally in the range of $50 to $150 for parts and labor. If a control board requires replacement, total repair costs including parts and labor typically range from $150 to $400 or more, depending on parts availability and labor rates in your area.

Related Hotpoint cooktop codes

All Hotpoint cooktop codes
View all 18 Hotpoint cooktop codes

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

Get Started

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