Why El Cajon's valley heat is rough on your appliances
Most appliance advice you'll read online is written for mild, temperate places. El Cajon isn't one of them. The city sits in a low inland valley where heat collects and lingers, and on a typical August day the air outside hits the high 90s while the inside of a closed garage can soar well past that. Refrigerators and freezers are the appliances that feel it most. A fridge is essentially a heat pump moving warmth from the inside to the outside, and when the surrounding air is already blazing, the compressor has to run longer and harder just to hold temperature. Over a few El Cajon summers that constant strain shows up as a fridge that runs nonstop, a freezer that frosts over, or a compressor that finally quits.
Garage and patio refrigerators are a special case around here. Plenty of homes in Fletcher Hills and Rancho San Diego keep a second fridge or a chest freezer in the garage for overflow groceries and drinks, and those units are rated for far cooler conditions than an El Cajon garage delivers in summer. Once the ambient temperature climbs above what the appliance was designed for, the thermostat gets confused, the unit short-cycles, and food spoils. We see this pattern every single year, and a lot of it is preventable with the right placement, a condenser cleaning, or a unit actually built for high-heat garage use.
Dust and fine valley grit are the other quiet culprits. El Cajon's dry, dusty air settles on condenser coils, in dryer vents and across cooktop igniters. A coil caked in dust can't shed heat, so the appliance overheats and works overtime. A lint-choked dryer vent in a closed laundry closet not only stretches drying times but becomes a genuine fire risk. Part of what we do on a service call is look past the obvious symptom and check these heat-and-dust stress points, because in this climate they're usually part of the story.