Cummins/Onan — Troubleshoot - High Exhaust Temperature
Testing & diagnosis · Cooling / exhaust system
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Check raw water strainer
- Check for cracked or leaking hoses
- Check loose hose clamps
- Check raw water pump impeller
- Check exhaust temperature switch
- Check heat exchanger
Specs & values
- SRT 00-0AN Step 01: 0.3 hr
- SRT 00-0AN Step 02: 1.0 hr
- SRT 00-0AN Step 03: 1.2 hr
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.