Champion Dishwasher Booster Thermistor Error Display
The booster thermistor error pattern, shown with 150 on the wash display, means the booster thermistor is defective, disconnected or has broken wires. A second pattern means both the booster and final rinse thermistors are affected. Reconnect or replace the thermistor harness.
Medium: the booster temperature cannot be read, so the final rinse cannot be confirmed.
- Code
- Booster thermistor error (booster/final-rinse display)
- Maker
- Champion
- Equipment
- Dish machines
- Applies to
- Same
What does Champion Booster thermistor error mean?
This is a thermistor error shown on the booster and final rinse display, with 150 on the wash display. The control cannot read the booster thermistor because it is defective, disconnected, or its wires are broken. A second pattern in the manual means both the booster and the final rinse thermistors are defective, unplugged, open or have broken wires between the display and the thermistor. The manual shows these patterns as icons, so the exact segments are not machine-readable here. The error is a missing reading, not a temperature, so the control cannot confirm the booster is heating correctly. The manual's action is to reconnect or replace the thermistor harness. After reconnecting, there is a 5 second delay before the display re-energizes, so a blank display just after the plug is pushed in is expected and not a new problem.
Affected models and control systems
UH130, UH130B, UH230, UH230B and UH330B M4 series dishwashers with the digital temperature display board; see the Digital Temperature Display Codes, printed pp. 54-57.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- A thermistor error pattern on the booster and rinse display
- 150 shown on the wash display
- No booster temperature number
- Hot rinse that is weak or inconsistent
Possible causes
Likely causes — what usually sits behind Booster thermistor error on this control. A technician confirms which one it is before any part is replaced.
- Booster thermistor defective
- Booster thermistor disconnected or wires broken
- Both the booster and final rinse thermistors defective, unplugged or open
- A thermistor plug pulled loose during cleaning or service
- A harness damaged by heat or steam near the booster
- Corrosion at the connector from constant moisture
Safe checks before calling for service
- Do not open panels; switch the machine off and avoid running loads while the pattern shows.
- Wait about 5 seconds after any reconnection before judging the display.
- Note whether the pattern appears with one or both thermistors affected.
- Record the 150 on the wash display and the pattern shown for the technician.
How a technician diagnoses Booster thermistor error
- Read which pattern shows, one thermistor or both.
- Inspect the thermistor harness and plugs for unplugged or damaged parts.
- Reconnect, wait the 5 second delay, and check whether the display recovers.
- Measure thermistor resistance and wire continuity to the display board.
- Replace the harness or thermistor only after the measurements show the break.
- The thermistor harness runs near live booster wiring behind the panels.
- Resistance and continuity checks need a meter and the correct thermistor values.
- The patterns are icons that must be read against the manual to tell one thermistor from both.
How Booster thermistor error differs from similar codes
This pattern is a booster and final rinse thermistor error, separate from the rinse display E that refers to the rinse thermistor alone.
Technical reference
- Maker documentation
- Champion owner support
- Edition
- Manual P/N 115440 rev. N4
- Models / control
- Same
- Section
- Digital Temperature Display Codes, printed pp. 54-57
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Champion dish machine error codes
Why does the display stay off right after reconnecting?
The manual notes a 5 second delay before the display re-energizes after reconnection.
Does 150 on the wash display mean the wash tank is at 150F?
The manual pairs 150 on the wash display with this booster indication, so it is part of the pattern, not a wash reading.
Can I keep washing?
The booster temperature is not verified while this shows, so have it checked before depending on the final rinse.
Need help with Champion Booster thermistor error?
A technician confirms the cause on site and gives you the price in writing before any work starts.