Briggs & Stratton PowerProtect DX 26kW Standby Generator with Symphony II Controller HIGH-TEMP Error Fix: High Temperature — Engine Overheating

Error code HIGH-TEMP on the Briggs & Stratton PowerProtect DX 26kW Standby Generator with Symphony II Controller means: High Temperature — Engine Overheating. The engine temperature exceeded the safe operating limit. The controller shut down the engine to prevent damage. Check that the generator enclosure has adequate ventilation — all airflow passages must be clear of debris, leaves, snow, and obstructions. Ensure shrubs or structures are not blocking the intake or exhaust louvers. Check the engine cooling fins and fan for debris buildup. In extreme ambient heat, reduce the electrical load. If the generator is in a confined space or too close to a building wall, the heated exhaust may recirculate into the intake. Air-cooled standby generators are typically rated for operation up to 104°F ambient.

The most successful fix is "Inspect and Repair Cooling System Components" (medium difficulty, ~60 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated critical severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Inspect and Repair Cooling System Components") is rated medium difficulty and takes about 60 minutes. Tools needed: Phillips screwdriver, Flathead screwdriver, Compressed air, Soft brush.

DIY cost: $10-$20. Professional repair typically costs $250-$400. Many homeowners save money by trying the top-ranked community fix first.

The Briggs & Stratton PowerProtect DX 26kW Standby Generator with Symphony II Controller has 8 other known error codes, including: CHARGER-FAULT (Charger Fault — Battery Charger Malfunction), CONTROLLER-FAULT (Controller Fault — Internal Logic Error), INSPECT (Maintenance Due — Service Reminder), LOW-BATTERY (Low Battery — Starter Battery Voltage Low), LOW-OIL-PRESSURE (Low Oil Pressure — Engine Protection Shutdown), and 3 more.

Error code HIGH-TEMP also appears on 2 other Briggs & Stratton models: 30675 12,000 Watt 20 HP 120/240V Standby Generator with Automatic Transfer Switch Ready, PowerProtect 22kW Standby Generator with Symphony II Controller. The fix may vary by model, so check each model's specific page for tailored repair steps.