Door gasket replacement MOST COMMON Frost ring at door, fog rolling out on open, rising energy draw | $180–$450 Installed, gasket included | Pull the old magnetic gasket, verify door frame is square, install replacement matched to the door profile (Kolpak, U.S. Cooler, Master-Bilt, Nor-Lake, or generic profiles carried on the truck), check hinge alignment and retest. |
Panel seal / joint gasket work Cold-air bleed along a seam inside the cooler, typically on walk-ins 12+ years old | $350–$900 Single seam | STIX-style cam-lock re-tension if that closes the gap, or interior joint gasket replacement at the affected seam. On U.S. Cooler, Kolpak, Master-Bilt, and Nor-Lake panel systems. If the panel itself has shifted from forklift contact or seismic flex, we scope a pull-and-reset separately. |
STIX cam-lock re-tensioning Early-stage seam bleed, panel joint still sound | $275–$550 Panel wrench work, no new parts | We bring the panel wrench kit, work the cam-locks on the affected seam in sequence, verify the interior gasket re-seats, and thermal-image the joint to confirm the cold-air bleed has stopped. No parts charge — this is labor only and usually runs 2 to 4 hours depending on panel count. |
Evaporator fan motor Grinding noise, uneven cold distribution, box drifting warm on far side | $320–$680 Motor + installed | Fan motor replacement on the Bohn, Larkin, or Heatcraft evaporator that pairs with most LA walk-ins. Common HP sizes (1/15, 1/8, 1/6) carried on the truck — larger motors ordered same-day through commercial parts supply. |
TXV (expansion valve) replacement Cooler can’t hold temp after a previous refrigerant retrofit | $400–$850 TXV + refrigerant recharge | Common after an R-22 to R-448A or R-449A retrofit where the original TXV orifice wasn't re-sized. We pull suction and discharge pressures, calculate target superheat, swap to a properly sized TXV for the refrigerant in use, and recharge. This is the single most common "mystery cooler" fix our techs run. |
Thermostat / controller replacement Box at 43°F while controller reads 38°F, or erratic cycling | $180–$420 Controller + installed | Mechanical thermostat, electronic controller (Danfoss, Dixell, Ranco, Honeywell), or temperature sensor replacement. We calibrate against a reference thermometer before leaving — a drifted controller is a health-inspection failure waiting to happen. |
Refrigerant recharge (leak-fixed) Slow temp creep over weeks, compressor running continuously | $450–$900 Refrigerant + labor only | After leak is located and repaired separately, evacuate system to deep vacuum, recharge with R-448A or R-449A to nameplate weight, verify superheat and subcool targets. 4 to 12 pounds typical on a walk-in cooler. Refrigerant priced per pound as a separate line item. |
Condensing unit service Rooftop unit under-performing, high head pressure, coil clogged | $600–$1,600 Labor-heavy, parts vary | Deep condenser coil cleaning (commercial degreaser, fin comb if bent), condenser fan motor inspection, contactor and start components tested, high-pressure switch verified, refrigerant charge confirmed. Annual on LA rooftops — grease and dust pack the fins fast, especially in Koreatown and Valley fast-casual strip malls. |
Compressor replacement MAJOR Unit not cooling at all despite refrigerant present | $1,800–$4,500 Compressor + refrigerant + labor | Semi-hermetic or scroll compressor replacement with full refrigerant recovery and recharge. 7.5 to 15 HP range typical on walk-in cooler condensing units. EPA 608 Universal certified (#1346255700410). We always run a repair-vs-replace calculation on units over 12 years old before recommending a compressor swap. |
Preventive maintenance plan Bi-annual visits, priority emergency dispatch | $400–$1,200/year Per walk-in, annual contract | Two visits per year — one before summer peak heat, one before the holiday high-load season. Each visit includes condenser coil cleaning, gasket inspection, refrigerant and pressure check, drain line clearing, temperature calibration, defrost cycle test. Multi-unit operators and ghost kitchens get quarterly. |