--- title: "True Residential refrigerator showing High temperature alarm" description: "What High temperature alarm means on True Residential refrigerators, what to check before booking, and when it is not a failure at all." url: "https://refrigeratorrepair.center/error-codes/true-high-temperature-alarm/" --- # True Residential refrigerator showing High temperature alarm The control has seen an unsafe product temperature for more than an hour. ## What High temperature alarm actually means. The control has seen an unsafe product temperature for more than an hour. On True refrigerators the limit is 50°F. On the undercounter models it is 20°F for a freezer and 70°F for a wine cabinet. On the undercounter models, the same key press turns on both this alarm and the door ajar alarm. True Residential refrigerator display · also shown as high temp What to do when High temperature alarm shows on the refrigerator ### Kind of code Service indication A light or a message asking for a visit. It says that something wants attention, not what, so the visit starts with a diagnosis. ### Usually leads to Diagnostic visit The visit that decides what the repair actually is, before any part is ordered. ### Shows up as Refrigerator Showing an Error Code A code narrows the search, but only the manufacturer's own table gives it meaning. ### Make True Residential Commercial-derived residential refrigeration: columns, undercounter units and glass-door cabinets. ### Source True Residential 15 inch and 24 inch Undercounter Install Guide and User's Manual, "B" & "C" revisions (true-residential.com PDF) Limits from True's 15 inch and 24 inch undercounter manual. The TR-42 and TR-48 columns show a "high temp" icon for refrigerator or freezer. ## Before you book, in this order. Each step comes from True Residential's own guidance for High temperature alarm on its refrigerators. Follow it to the end: the last card says whether this is a visit. 01 Check that the door is closed and look for a recent power loss or a big load of warm product. 02 Check the temperature of the food. The alarm means it has been at or above the limit for an hour. 03 If the cabinet does not recover, book a visit. ### Still there? It usually turns into [diagnostic visit](https://refrigeratorrepair.center/services/diagnostic-visit/). Book with the code and the model number. ### What not to do It is not the door ajar alarm, which goes off after a few minutes with the door open. This alarm waits for a full hour at temperature. ## What you may notice with it. The refrigerator problem High temperature alarm tends to arrive with. Answer these at the refrigerator before anyone is booked. [All problems](https://refrigeratorrepair.center/problems/) Before you call ### [Refrigerator Showing an Error Code](https://refrigeratorrepair.center/problems/refrigerator-error-code/) [All 5 causes, cheapest first](https://refrigeratorrepair.center/problems/refrigerator-error-code/) Problem ### Refrigerator Showing an Error Code 5 causes, cheapest first Where High temperature alarm usually leads ## Diagnostic visit. Book a visit [What the job involves](https://refrigeratorrepair.center/services/diagnostic-visit/) ## Read these before the visit. Short guides that make the call quicker and the diagnosis cheaper. [All guides](https://refrigeratorrepair.center/guides/) How not to need us ### The condenser, the grille, and the one job that prevents the most calls Why it is doing that ### A refrigerator that never stops running Error codes ### All 247 codes, by make ## True Residential refrigerators. Commercial-derived residential refrigeration: columns, undercounter units and glass-door cabinets. [True Residential refrigerator repair](https://refrigeratorrepair.center/brands/true/) More True Residential codes [REF](https://refrigeratorrepair.center/error-codes/true-ref/) [Communication Error](https://refrigeratorrepair.center/error-codes/true-communication-error/) [Showroom Mode](https://refrigeratorrepair.center/error-codes/true-showroom-mode/) [Door ajar alarm](https://refrigeratorrepair.center/error-codes/true-door-ajar-alarm/) Service indication on other makes [Sub-Zero Service](https://refrigeratorrepair.center/error-codes/sub-zero-service-light/) [Viking High Temperature Alarm](https://refrigeratorrepair.center/error-codes/viking-high-temperature-alarm/) [Bosch E03](https://refrigeratorrepair.center/error-codes/bosch-e03/) [Gaggenau ALARM symbol](https://refrigeratorrepair.center/error-codes/gaggenau-alarm-symbol/) [Miele F0](https://refrigeratorrepair.center/error-codes/miele-f0/) [Liebherr F1 to F5](https://refrigeratorrepair.center/error-codes/liebherr-f1-to-f5/) [U-Line Temp Hi 6H+](https://refrigeratorrepair.center/error-codes/u-line-temp-hi-6h/) [GE FF](https://refrigeratorrepair.center/error-codes/ge-ff/) [All 56 codes of this kind](https://refrigeratorrepair.center/error-codes/#family-service-indication) True Residential builds this ### Built-in refrigerator Flush with the cabinets, serviced from the front, and almost always repaired rather than replaced. True Residential builds this ### Refrigerator column Separate refrigerator and freezer towers, each with its own sealed system — so a failure stays on one side. True Residential builds this ### Undercounter refrigerator A single 15 to 24 inch unit under the worktop — front-vented, tightly enclosed, and easily starved of air. ## In True Residential's own words > The electronic control will monitor temperatures and activate an alert if unsafe product temperatures are present for more than 60 minutes. [True Residential 15 inch and 24 inch Undercounter Install Guide and User's Manual, "B" & "C" revisions (true-residential.com PDF)](https://true-residential.com/wp-content/uploads/2021/03/975557_TRL-15_24-B-C-Install-Manual_REV_E_EN_FULL-MANUAL.pdf) [True Residential 15 inch and 24 inch Undercounter Install Guide and User's Manual, "B" & "C" revisions (true-residential.com PDF)](https://true-residential.com/wp-content/uploads/2021/03/975557_TRL-15_24-B-C-Install-Manual_REV_E_EN_FULL-MANUAL.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Limits from True's 15 inch and 24 inch undercounter manual. The TR-42 and TR-48 columns show a "high temp" icon for refrigerator or freezer. ## True Residential High temperature alarm refrigerator repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Check that the door is closed and look for a recent power loss or a big load of warm product. If it comes back, it needs a visit. ### How warm does my True refrigerator have to get before the high temperature alarm sounds? The fresh food limit is 50°F, held for a full hour. On undercounter models a freezer alarms at 20°F and a wine cabinet at 70°F. By the time it sounds, the product has been at or above that limit for 60 minutes. ### Why did my True high temperature alarm and door alarm both turn on together? On the undercounter models a single key press enables both alarms. They report different things: the door alarm fires after a few minutes open, the temperature alarm after an hour at the limit. A cabinet that fails to come back down to temperature is the cue to book a visit. --- **[Read on the site: True Residential refrigerator showing High temperature alarm](https://refrigeratorrepair.center/error-codes/true-high-temperature-alarm/)** **[Book a visit with RefrigeratorRepair.center](https://refrigeratorrepair.center/schedule/)**