Temperature Fluctuations

What Causes Temperature Fluctuations

Temperature fluctuations happen when a refrigerator cannot hold a steady setpoint, swinging between too warm and too cold instead of maintaining one temperature. A failed thermostat or temperature sensor is the most common cause, since it sends inaccurate readings that make the compressor cycle on and off at the wrong times. A stuck or failing damper can send too much or too little cold air to one compartment, which shows up as one section running colder than the other. A dirty condenser coil reduces overall cooling capacity, which can look like fluctuation but is actually a steady loss of efficiency. Digital models often display inconsistent temperature readings even before food inside starts to show signs of the swing.

How San Marcos Appliance Repair Fixes It

A technician tests the thermostat, temperature sensor, and damper on-site, and checks the condenser coil for buildup that would reduce cooling capacity. San Marcos Appliance Repair stocks common thermostats and sensors for major brands, which keeps most temperature fluctuation repairs to a single visit. Every completed repair carries a 90-day parts-and-labor warranty. Call 760-621-5157 to schedule same-day service.

Diagnosed by Certified Technicians

Checking the thermostat, temperature sensor, damper, and condenser coil isn't guesswork: every technician holds NASTeC certification in appliance service and repair and an EPA Section 608 certification for refrigerant handling, required for work on this sealed cooling system, with training from MiraCosta College's Technology Career Institute or San Diego College of Continuing Education (SDCCE) built on hands-on repair fundamentals under founder and Master Appliance Repair Technician Francisco Ortega, who has led the company since 2006. That standard is why every temperature fluctuations repair carries a 90-day parts-and-labor warranty under our licensed and insured guarantee.