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Claim This BusinessMr. Cool Air Conditioning, Transmission & Brake, Inc has served Knoxville drivers since establishing its garage doors on the corner of Clinton Highway. The shop holds a 4.6-star rating across 453 verified customer reviews, reflecting years of consistent transmission, brake, and climate-control work. Operating Monday through Friday from 8 AM to 6 PM, the team handles everyday driveability issues alongside more complex diagnostic puzzles that send customers searching for a second opinion.
What separates this shop from the dealership down the road becomes clear in the reviews: owner-operator involvement and willingness to advocate for customers facing difficult situations. One reviewer describes how Mr. Brown covered an $800 repair bill out of pocket when a Carvana-purchased vehicle failed midway through a family road trip. The shop earns trust not through advertising but through problem-solving approaches that other shops would decline or overlook, particularly with known model-specific weaknesses.
Customer narratives shared across multiple five-star reviews underscore this approach. Anna D. Arapakos returned with a Nissan Rogue whose AC system reverted to the same fault after initial repair; the team diagnosed a deeper root cause the dealership had missed and resolved it permanently. Timothy Owens credits Mr. Brown personally for preventing his family from being stranded in Tennessee by investing in a solution rather than quoting a bill. These specific scenarios illustrate what keep locals calling this shop first when a vehicle turns problematic.
Three of four publicly visible reviews award five stars, citing owner-level personal service and refusal to abandon customers facing difficult problems. The lone one-star review documents a transmission follow-up issue where communication broke down, representing the shop's primary area for improvement.
| Sunday | Closed |
| Monday | 8 AM–6 PM |
| Tuesday | 8 AM–6 PM |
| Wednesday | 8 AM–6 PM |
| ThursdayToday | 8 AM–6 PM |
| Friday | 8 AM–6 PM |
| Saturday | Closed |
Diagnosing AC failures, refrigerant leaks, and heater core issues across all vehicle makes with emphasis on known model-specific weaknesses.
Transmission fluid service, slip diagnostics, and component-level repair for both automatic and manual transmission configurations.
Pad replacement, rotor resurfacing, brake line inspection, and ABS diagnostic work for safety-critical stopping systems.
Addressing wiring harness failures, short circuits, and electrical faults that cause intermittent sensor or starting issues.
Identifying root causes that previous shops missed, particularly on vehicles with complex or repeated failure patterns.
Evaluating vehicles that have broken down en route or shortly after purchase to determine immediate drivability versus tow necessity.