Food Safety When Commercial Refrigeration Fails

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When a cooler or freezer fails, the hardest call is not the repair. It is deciding which food can still be sold and which goes in the bin, and whether you need to close. This page sets out the California rules and the official guidance that answer those questions, in plain language, with links to each source so you can check them yourself.

This guide is part of our Commercial Refrigeration Help Center. If the unit is failing right now, start with the first 60 minutes checklist and come back here to make the food decisions.

The number that matters: 41°F

California's Retail Food Code (CalCode) says potentially hazardous food "shall be maintained at or above 135°F, or at or below 41°F" (CalCode 113996). CDPH describes potentially hazardous foods as "those foods that can support the rapid growth of microorganisms at temperatures between 41°F and 135°F." In a kitchen that means items such as meat, poultry, seafood, dairy, eggs and cooked food. The same section lets a few items be held at or below 45°F, including raw shell eggs, unshucked live molluscan shellfish, and pasteurized milk and milk products in original sealed containers.

Frozen food has its own rule: "Frozen foods shall be stored and displayed in their frozen state unless being thawed" by an approved method (CalCode 114018). The FDA Food Code 2026, the national model code, also uses 41°F for cold holding (FDA Food Code 2026), but California's binding rule is CalCode.

You may see "40°F" in FDA and USDA advice. That is consumer guidance for home refrigerators. For a restaurant or store in California, the legal line is 41°F.

Measure the food, not just the air

Every refrigeration unit must have a thermometer that reads the air "in the warmest part of the unit" and is readable in steps of no more than 2°F (CalCode 114157). That tells you the unit is failing. It does not tell you how warm the food is. Use a calibrated probe thermometer on several items, especially dense products near the door and on upper shelves. CDPH recommends having "Calibrated food thermometers, a battery operated clock and a temperature log" on hand before anything goes wrong.

What to keep and what to discard: the CDPH table

CDPH's retail guidance for temporary power outages gives a decision table for refrigerated potentially hazardous food, based on the food's temperature and how long the outage lasted. It is the clearest official guide for any refrigeration failure. Alameda County's environmental health program points operators to this same handout.

Source: CDPH Food and Drug Branch, "Guidelines for Food Safety at Retail Establishments During Temporary Power Outages," Rev. 1/2025 (CDPH PDF). In short: refrigerated food that reaches 50°F or above must be discarded, and food held above 41°F for 4 hours or more must be discarded. Food at 42°F to 49°F that has been warm for less than 3 hours must be cooled back to 41°F quickly.

Two things the table does not settle. First, it has no row for 3 to 4 hours; if you are in that window with food above 41°F, call your county before selling anything. Second, it only works if you know the times. CDPH is explicit: "If you are unable to verify the length of time a product spent in the temperature danger zone, it should be discarded. When in doubt, throw it out!"

Hot food has its own table. Hot-held food that dropped to 134°F or below for up to 2 hours may be sold if it is reheated to 165°F and then held at 135°F or above, or rapidly cooled to 41°F or below within two hours. After 2 hours or more, it is discarded.

The "4-hour rule" is not a repair window

CalCode's four-hour rule is "time as a public health control" (CalCode 114000). It is a planned practice: the food is marked with a time four hours out, served or discarded by then, and the business must keep written procedures available to the inspector. It is not permission to leave food in a broken cooler for four hours. For a failure, use the CDPH table and your county's guidance.

Cooling rules also matter after a failure, when you cook or chill product to save it. Cooked food must go from 135°F to 70°F within two hours and to 41°F or below within six hours in total (CalCode 114002).

Frozen food and refreezing: follow your county

Bay Area counties do not agree on refreezing, so there is no single rule to give you.

• Santa Clara County: "Foods that thaw and stay below 41°F may be used, but should not be refrozen" (Santa Clara County DEH, July 2026).
• San Mateo County: "If thawed food does not exceed 41°F for more than four hours, it may be refrozen" (San Mateo County EHS).

Use the rule of the county where your business operates. If you are in Alameda or Contra Costa County, or unsure, call your county before refreezing anything. Thawed food that went above 41°F falls under the CDPH table above. When you do thaw on purpose, CalCode allows thawing under refrigeration at 41°F or below, or fully submerged under running potable water at 70°F or below for no more than two hours, among other methods (CalCode 114020).

Closing and calling the county

Here the wording matters. CalCode defines an "imminent health hazard" as a threat that "requires immediate correction or cessation of operation to prevent injury, illness, or death" (CalCode 113810), and it lets an enforcement officer suspend a permit and close a facility when such a hazard is not immediately corrected (CalCode 114409). California law does not itself contain a clause that makes the operator close and notify the county after a refrigeration failure. The FDA Food Code does (section 8-404.11), but California has not adopted that section.

County environmental health guidance fills the gap, and it is direct:

• Santa Clara County's power-outage flyer tells food facilities that when "adequate refrigeration cannot be provided," they must be closed. It adds that an outage of 2 hours or less "is not considered hazardous to food that was held under safe conditions when the outage began."
• San Mateo County's guidance says "Close the facility if: ... There are unsafe food temperatures," and "Call Environmental Health Services before reopening."

In practice: if you cannot keep potentially hazardous food at 41°F or below, stop selling it, and call your county environmental health office for direction before you reopen.

Document everything

A written record protects your customers, backs up your discard decisions with the inspector, and helps with any insurance or landlord conversation. San Mateo County tells operators to "Write down time when food rises above 41°F" and to "Check hot foods every hour and cold foods every two hours." Keep:

• The time the failure started or was discovered, and the time refrigeration was restored.
• Air and product temperatures with the time of each reading and who took it.
• Where product was moved, and the temperature of the unit it went into.
• A discard list: item, quantity, temperature, reason. Photos help.
• Any calls with the county: date, time, the name of the person you spoke with, and what they told you.
• The service ticket or invoice for the repair.

Discarding food the right way

Once food is on the discard list, it leaves the building. Do not sell it, discount it, use it for staff meals, or donate it. Separate it from good product right away, mark it clearly so nobody puts it back, and dispose of it in a way that keeps it out of reach of people and pests. Clean and sanitize the shelves and floor it came from.

Restarting after the repair

1. Prove the unit first. Let it pull down empty and confirm with its own thermometer and a probe that it holds 41°F or below, or a freezer holds product frozen, before you restock.
2. Clean it. Meltwater, spills and drips from the failure need cleaning. CalCode requires equipment to be "kept clean, fully operative, and in good repair" (CalCode 114175).
3. Load in stages. Put back cold product first. Do not load a batch of warm food into a unit that just recovered.
4. Follow the county's reopening steps if you closed or spoke with an inspector.
5. Keep logging for the next few days. A unit that failed once and drifts again needs a second look.

Preventing the next loss

Three habits do the most to limit food loss: thermometers someone actually reads, a temperature log, and equipment that gets regular service. Our health inspection refrigeration checklist turns those into daily and weekly tasks. For outages specifically, read power outages and commercial refrigeration. For why dependable service matters so much to food businesses, see reliable refrigeration for food and beverage businesses, and ask us about a maintenance plan.

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Frequently asked questions

Written and reviewed by Jim McKinny, owner of Cool Aid Air Conditioning & Refrigeration — California C-20 and C-38 licensed, EPA Universal certified, second generation of a family business serving the Bay Area since 1966. Every job we complete is backed by our 1-year parts & labor warranty.