An operator-run blog about underground cold storage, freezers, and dry storage near St. Louis. Practical notes for operators and storage shoppers.https://cavewarehouse.com/https://cavewarehouse.com/posts/refrigeration-checklist-daily-weekly-monthly/https://cavewarehouse.com/posts/refrigeration-checklist-daily-weekly-monthly/The daily, weekly and monthly checks we run on an ammonia freezer plant underground, and the real problem from our own logs that each one is there to catch.Fri, 23 Oct 2026 00:00:00 GMTRefrigerationMaintenanceChecklistshttps://cavewarehouse.com/posts/when-the-hydrometer-lies/https://cavewarehouse.com/posts/when-the-hydrometer-lies/Our brine read one strength in the field, another in the lab, and neither matched the target. Here's what threw the readings off and how I check brine now.Thu, 22 Oct 2026 00:00:00 GMTRefrigerationBrineLessons learnedhttps://cavewarehouse.com/posts/snowstorm-behind-the-racks/https://cavewarehouse.com/posts/snowstorm-behind-the-racks/I walked into a freezer room and found what looked like a snowstorm behind the racking. Here's what caused it, how we sealed it, and what I check now.Wed, 21 Oct 2026 00:00:00 GMTMaintenanceHumidityLessons learnedhttps://cavewarehouse.com/posts/defrost-timer-120-minute-bug/https://cavewarehouse.com/posts/defrost-timer-120-minute-bug/Our old controllers read a defrost time of 1:20 as 80 minutes. The new system read 120 as 120. Why our defrosts kept overlapping, and how I found it.Mon, 19 Oct 2026 00:00:00 GMTRefrigerationControlsLessons learnedhttps://cavewarehouse.com/posts/the-day-from-hell/https://cavewarehouse.com/posts/the-day-from-hell/One July 2025 week in an underground freezer: head-pressure alarms, half the units off, a smoking pump motor, and a sewer backup. What I took from it.Mon, 19 Oct 2026 00:00:00 GMTOperationsRefrigerationLessons learnedhttps://cavewarehouse.com/posts/cold-storage-temperature-log-template/https://cavewarehouse.com/posts/cold-storage-temperature-log-template/Free printable temperature log for freezers, coolers, and cold rooms, plus CSV and calibration logs and the federal rules for storage-only warehouses.Sat, 17 Oct 2026 00:00:00 GMTTemplatesTemperature loggingCompliancehttps://cavewarehouse.com/posts/the-defrost-game/https://cavewarehouse.com/posts/the-defrost-game/How I stagger defrosts across 17+ freezer units without choking the compressors: what each phase takes, and why the schedule is never finished.Sat, 17 Oct 2026 00:00:00 GMTRefrigerationMaintenanceOperationshttps://cavewarehouse.com/posts/why-underground-cold-storage-works/https://cavewarehouse.com/posts/why-underground-cold-storage-works/Running an underground freezer in the Valmeyer bluffs: steady 58 °F rock, frozen columns, storm protection, and where the savings come from.Fri, 16 Oct 2026 00:00:00 GMTUnderground storageOperations