Electric fan issues

Your 2013 Volvo VNL 680 with a D13 engine has coolant temps spiking to 210°F during uphill climbs and staying there briefly, unlike its previous cycling around 180°F. The A/C isn’t cooling despite being charged and having a working compressor. Recent repairs include a thermostat and water pump (six months ago) and a piston cooling valve, oil temp sensor, and oil change (three weeks ago, when issues began). The electric fan clutch has normal resistance when off, and there’s no antifreeze loss.

Likely Causes:

1. Electric Fan Clutch: Not engaging properly, reducing airflow to the radiator and A/C condenser, causing high coolant temps and poor A/C cooling.
2. Piston Cooling Valve: Faulty or improperly installed since replacement, possibly increasing engine heat and coolant temps.
3. Radiator/Condenser Blockage: Debris restricting airflow, affecting both cooling and A/C.
4. A/C System Issue: Blocked expansion valve or restriction, causing poor cooling (less likely for coolant temps).
5. Thermostat/Water Pump: Unlikely, but premature failure could limit coolant flow.

Action Plan:

1. Test Fan Clutch: Check if it engages (loud spin) at 200°F or with A/C on. Use a scan tool for fan codes. Replace if faulty ($300–$500).
2. Inspect Piston Cooling Valve: Verify part and installation; check for oil system codes. Replace if defective.
3. Clean Radiator/Condenser: Remove debris to restore airflow.
4. Diagnose A/C: Check pressures (high: 150–300 psi, low: 25–40 psi). Replace expansion valve if blocked.
5. Re-Check Thermostat/Pump: Test if other steps fail.

Next Steps: Start by testing the fan clutch during a climb or with A/C on. Share if the fan engages, oil condition from the recent change, A/C air temp, and your area for shop recommendations. Focus on the fan clutch first, as it likely affects both issues.

 

Install a fan switch to prevent it from going up towards 210 degrees