Harris Radiator Auto Repair and Air Conditioning on Encinitas's Westlake Street has specialized in automotive cooling systems and climate control since 1947, making it one of the city's longest-continuously-operating repair facilities. The cooling-system focus covers radiator core replacement, heater core extraction, thermostat diagnostics, and R-134a/R-1234yf AC recharge — a thermal-specialist depth supported by OEM and aftermarket component sourcing through O'Reilly Auto Parts for precise fitment across import and domestic platforms. ASE-certified technicians expanded the service menu beyond the original radiator specialty to include full engine diagnostics, brake service, tune-ups, and general maintenance following a 2017 operational alignment with Brad's Foreign and Domestic. The Westlake Street location sits near the Encinitas Boulevard interchange, serving I-5 corridor commuters traveling between Cardiff-by-the-Sea and Leucadia. Multi-day cooling overhauls — head gasket replacement, full radiator core swap, or compressor clutch rebuild — may require temporary transportation, available through Enterprise Rent-A-Car on the Encinitas commercial grid. Highest-complexity thermal services include pressure-testing aluminum radiator cores for micro-fracture leaks, AC evaporator core replacement requiring full dashboard disassembly, and heater control valve actuator recalibration on dual-zone HVAC systems.