Rick's Free Auto Repair Advice

Posts Tagged: radiator fan

Silverado P0480

Diagnose and fix Silverado P0480 trouble code and overheating Shops are reporting multiple instances of a Silverado P0480 trouble code with an overheating condition. These trucks have two radiator fans and three relays. The three relays allow the fans to run at two speeds. So don’t get fooled into thinking that because the fans are running, they’re not the problem. They could be running on low speed and not pulling in enough air to cool. Here’s how GM 2-speed radiator fans work Low speed fan operation The PCM provides ground … Read More

P1491 Radiator Fan Control Relay Circuit

P1491 Radiator Fan Control Relay Circuit If you have a P1491 Radiator Fan Control Relay Circuit trouble code, this post will help you understand what it is and how to fix it. Most late model vehicles use an electric fan to pull air through the radiator. The vehicle computer monitors coolant temperature with a sensor located near the thermostat. When coolant temperature rises above acceptable limits, the computer provides ground to the fan relay. The ground completes the circuit to the relay and switches power to the fan. A code … Read More

Overheating problems Crown Vic, Grand Marquis, Town Car

Fix Overheating problems on Crown Vic, Grand Marquis, Town Car Ford is reporting overheating problems with 2006-07 Crown Victoria, Grand Marquis, and Lincoln Town Cars. The vehicles run hot and experience poor cooling from the A/C. The problem is most severe at low speeds or while idling. You guessed it, the problem is with a bad electric cooling fan. The fix is to install a newer design, fan, part #7W1Z-8C607-B. © 2012 Rick Muscoplat   Save

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