Defrost Timers

Types of Defrost Timers:

1. Mechanical Defrost Timers:

   • Use a motor-driven clock mechanism to cycle between cooling and defrost modes.
   • Commonly found in older refrigeration units.
   • Typically have settings for defrost cycle duration and frequency (e.g., every 6, 8, or 12 hours).

2. Electronic Defrost Timers:

   • Controlled by microprocessors for precise timing.
   • Found in modern frost-free refrigerators.
   • Can adjust defrost cycles based on temperature sensors and usage patterns.

Common Defrost Timer Models:

• Ranco® DT1 Series: Universal timers for commercial and residential refrigerators.
• Paragon 8145 Series: Heavy-duty timers used in large commercial refrigeration systems.
• Supco UET120: Universal electronic replacement for various mechanical timers.

Signs of a Faulty Defrost Timer:

• Excessive frost buildup in the freezer.
• Refrigerator running continuously without defrosting.
• Water leakage from melted ice when the timer is stuck in defrost mode.
• Clicking noises indicating the timer is struggling to switch modes.