T&H Mechanical · Knowledge Base
Technical Articles & How-To Guides
Plain-English guides to commercial refrigeration and HVAC from the team at T&H Mechanical — written for Twin Cities business owners, built for our climate.
Commercial Refrigeration Guides
AC TroubleshootingWhy Is My AC Icing Up — and What Can I Do About It?Frozen evaporator coil? It’s almost always airflow. Every cause, how to diagnose it with static pressure, and why you always check airflow before refrigerant charge.Read the guide →
AC TroubleshootingLow-Voltage Shorts: Why Your AC Blows Fuses, Goes Blank, or Won’t RunThe 24-volt control circuit is the #1 hidden cause of an AC that trips its fuse, goes blank, won’t cool, or won’t start — how to find the short instead of oversizing the fuse.Read the guide →
Commercial RefrigerationWalk-In Freezer Construction: Panels, Doors, Floors & RefrigerationHow a commercial walk-in freezer is built — insulated panels, doors, floors and frost-heave protection, sealing and vapor barriers, and refrigeration, from a restaurant box to cold storage.Read the guide →
Commercial RefrigerationWhat Size Unit Do I Need For My Wine Cellar?Sizing a cooling unit for a home or commercial wine cellar — heat load, target temperature, and the humidity that protects your bottles.Read the guide →
Commercial RefrigerationKeeping Beer at 32°F: The Liquor-Store Walk-In ChallengeHow to hold beer as close to 32°F as possible in a Minnesota liquor store — without freezing the coil or the product.Read the guide →
Commercial RefrigerationWalk-In Defrost Done Right: Multiple EvaporatorsDefrosting several evaporators the smart way — staggered timing, solenoids, and controls that keep box temperature rock-steady.Read the guide →
Commercial RefrigerationThe Best Walk-In Cooler Setup for Holding BeerThe ultimate cold-beer setup — multiple evaporators, dual condensers, and electric defrost for the coldest, most reliable box.Read the guide →
Commercial RefrigerationThe Twin Cities Florist’s Guide to Flower CoolersWalk-in, reach-in, and open-display coolers for florists — the temperature, humidity, and Minnesota-winter details that keep flowers fresh.Read the guide →
Commercial RefrigerationThe Twin Cities Butcher’s Guide to Meat Market RefrigerationCases, coolers, freezers, smokehouses, dry-aging, Minnesota-ready outdoor units, and the strip-mall HVAC trap for a full-service meat market.Read the guide →Have a Refrigeration or HVAC Question?
Whether it’s a walk-in that won’t hold temp or a new buildout, our team services the East Metro Twin Cities & Western Wisconsin — 24/7.
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