Staff Answer
Sep 27, 2026 - 06:24 PM
If it cools on LP but not on AC, the AC heater is the most likely culprit. For a 662, that's the 621702 AC heater if your cooling unit serial is below 11231023, or the 638374 AC heater if it's above. If it's weak on both AC and LP, the cooling unit may be getting tired. Email info@rvfridgeguys.com and we'll walk you through where the thermistor connects on your model.
If you have any questions, just reach out at info@rvfridgeguys.com or call us at 800-712-8822. You can find everything we carry at www.rvfridgeguys.com.
