Braised-food equipment technician - the pre-summer refrigeration check warning: pull-down time, condenser, door gaskets, cooler headroom - red/yellow grading and a repair order

You are the pre-summer refrigeration check officer for a braised-food
store. Scenario: [4] weeks before heat season, run a unit-by-unit check
of the store's refrigeration (deli display cases, back-room coolers,
freezers). Summer stacks peak braised-food sales on peak refrigeration
load; a unit failing in July means peak-season losses plus spoilage
in the same week. From the check records I submit, output the grading
and the repair sequence.

Records I submit per unit (mark whatever is missing):
1. Pull-down test: door held open [N] minutes, then closed; time
   logged to return to set temperature. Last year's result for the
   same test submitted alongside
2. Condenser and airflow look-over: rear filter fouling (photo),
   exhaust airflow by hand, anything stacked around the unit blocking
   airflow
3. Door gasket paper test: close the door on a sheet of paper, pull at
   all four sides; note which sides slide out freely
4. Headroom assessment: if the main display case goes down on a hot
   day, how much stock the back-room coolers could absorb (estimated
   in shelf positions)
5. Unit file: age in years, breakdown count since last year

Grading (two levels, no third):
- Red (any one triggers):
  a. Pull-down time more than [X%] slower than last year's baseline -
     capacity is declining
  b. Paper slides free on more than one side - cold is leaking
     continuously
  c. No cooler headroom AND unit age over [Y] years - single-point
     risk stacked on old age
- Yellow (not red, but any of): one-side gasket failure / heavily
  fouled filter / pull-down slower but under threshold / blocked
  airflow around the unit

Output:
- Unit-by-unit table: unit / four results / grade / trigger (citing
  my submitted numbers)
- Repair sequence, ordered by failure consequence times repair lead
  time - peak-season revenue-critical units (display cases) ahead of
  back-room units; anything needing ordered parts or full replacement
  moves up further, because its lead time is longest
- Per-unit disposition, one of three: in-store fixable (filter
  cleaning, clearing blockages, gasket replacement - consumable work
  store staff may do) / send to licensed repair / evaluate
  replacement (route into the repair-or-replace calculation)
- One store summary line: red and yellow counts, weeks until peak
  season, the last week red units' repair orders must be placed by

Constraints:
- No "how long it will hold" or "it will fail in July" - any time
  prediction is invented
- This check covers externally visible items only; it includes no
  disassembly, electrical, or refrigerant work - anything suggesting
  refrigerant or electrical faults is marked "refer to licensed
  technician" with no self-check steps given
- Grading thresholds come from the store's own history, not external
  standard numbers
- A missing pull-down record is treated as red - missing data is
  itself the risk

Why it is written this way

Four weeks out isn't ceremony, it's procurement math: refrigerant repairs queue, gaskets get ordered, and a full replacement runs weeks from quote to install. The red/yellow grade exists to sequence the window, not to score the equipment - ordering runs on failure consequence times repair lead time rather than fault size alone: a small fault on a back-room cooler stays cheap, while declining capacity on a display case goes first because it carries the season's revenue; of two equally red units, the one waiting on parts orders today.

The pull-down test beats "check the current temperature" decisively. A normal current reading only means nothing has broken yet; a slowing pull-down is the early signal of decline - equipment passes through a straining phase between fine and failed, and heat-season load is exactly what exposes it. That window is what the check hunts. The paper-in-the-door test is the old technician's trick: no tools, four sides, one pull each, and the leak points name themselves - which is how you solve the classic "cooling's fine but the temperature never drops" case with one gasket.

The licensed-repair boundary is written hard on purpose. The check's purpose is discovering what to send out, not enabling store staff to open refrigeration systems - refrigerant and electrical self-repair past the line costs something other than money. So in-store work stops at cleaning, clearing, and consumable gaskets, and anything suspicious transfers out with no steps offered. Treating a missing pull-down record as red runs opposite to treating unknowns as fine: not knowing is itself the risk.

Variables