Cummins-Onan QD error code 24 (QD)
Faulty engine temperature sender — after 10 minutes of normal operation the controller sensed an open temperature sender or harness. (Code 24, second-level)
What to check, and in what order, is in the app. A step-by-step flow walks this code with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Onan RV Quiet Diesel Operator Manual 0981-0173 (HDKCA/HDKCB)
- Onan RV QD HDKCA/HDKCB Operator Manual 0981-0173 (rv-tech-resources/93-onan-qd-diesel/Onan_RVQD_HDKCA_HDKCB_Operator_0981-0173.pdf)
Related codes
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- 15 (QD)Under-frequency — automatic shutdown (during normal operation…
- 19 (QD)Actuator shorted or open — at startup the controller sensed an open…
- 22 (QD)Actuator overload — the controller held the governor actuator at full…
- 27 (QD)VAC sense lost — the controller lost AC-voltage sensing during normal…
- 29 (QD)High battery voltage — the controller sensed battery-system voltage…
- 32 (QD)Starting fault — the controller could not detect cranking speed…
- 35 (QD)EE checksum fault — at startup the controller detected an EEPROM…