--- title: "True High Temperature Alarm: the cabinet has held warm for a full hour" description: "What High Temperature Alarm means on True High Temperature Alarm: the cabinet has held warm for a full hours, what to check before booking, and when it is not a…" url: "https://appliancemaintenance.center/error-codes/true-high-temperature-alarm/" --- # True High Temperature Alarm: the cabinet has held warm for a full hour True's control does not raise this alarm for a brief warm spell from normal door use. ## What High Temperature Alarm actually means. True's control does not raise this alarm for a brief warm spell from normal door use. It waits for the zone to hold at or above about 50°F in a refrigerator zone, or 70°F in a wine cabinet zone, for one full consecutive hour before posting the alert. True Residential home appliance display · also shown as High Temps What to do when High Temperature Alarm shows on the home appliance ### Kind of code Temperature The appliance has seen a temperature outside its range and is saying so, and on a maintenance visit the cause is usually outside the sealed system: a door left ajar or a gasket that no longer seals, a condenser coil furred with dust and pet hair, a grille blocked, or a unit squeezed into an alcove with no air around it. Close the door, check the gasket, give the coil air and time, and book coil cleaning; if it will not cool at all, that is a repair. ### Usually leads to Condenser coil cleaning Dust and pet hair brushed and vacuumed off the coil and fan of every cold storage unit in the house. ### Shows up as Appliance Maintenance Code or Reminder Light: Filter, Descale, Vent Check An appliance maintenance code is a reminder, icon or short code on a display asking for a filter change, descaling, a tub clean, rinse aid or an exhaust check rather than reporting a broken part. ### Make True Residential True Residential units carry commercial-style cooling into the home, and their undercounter coils and heavy door gaskets need the same regular cleaning a restaurant unit gets. ### Source True Residential 15 & 24 Inch Service Manual Documented on True Residential's 15 and 24-inch undercounter refrigeration and wine platform; the exact trigger temperature differs between a refrigerator zone and a wine-cabinet zone on the same control board. ## Before you book, in this order. Each step comes from True Residential's own guidance for High Temperature Alarm on its home appliances. Follow it to the end: the last card says whether this is a visit. 01 Make sure the door is fully closed and the gasket is sealing all the way around. 02 Clear anything blocking the front grille where the unit draws air. 03 Vacuum the condenser coil if it has not been cleaned in the last six months — True's own manual ties dust build-up on the coil directly to warm running. 04 If the alarm is still active after the door, grille and coil are checked, book a visit rather than keep resetting the control. ### Still there? It usually turns into [condenser coil cleaning](https://appliancemaintenance.center/services/condenser-coil-cleaning/). Book with the code and the model number. ### What not to do This is a sustained-temperature alarm, not a sensor problem. True documents a separate probe-failure condition for a genuinely broken temperature sensor, which behaves differently from a cabinet that is simply running warm. ## What you may notice with it. The home appliance problems High Temperature Alarm tends to arrive with. Answer these at the home appliance before anyone is booked. [All problems](https://appliancemaintenance.center/problems/) Before you call ### [Appliance Maintenance Code or Reminder Light: Filter, Descale, Vent Check](https://appliancemaintenance.center/problems/appliance-maintenance-code/) [All 8 causes, cheapest first](https://appliancemaintenance.center/problems/appliance-maintenance-code/) It also comes with - [**Cold Storage Running Nonstop: Coil Dust, Clearance and Door Seals**](https://appliancemaintenance.center/problems/cold-storage-running-nonstop/) - [**Appliance Energy Use Creeping Up With Nothing Else Changed**](https://appliancemaintenance.center/problems/energy-use-creeping-up/) Problem ### Appliance Maintenance Code or Reminder Light: Filter, Descale, Vent Check 8 causes, cheapest first Where High Temperature Alarm usually leads ## Condenser coil cleaning. **Condenser coil and fan cleaned on a refrigerator, freezer, wine or beverage unit or ice maker, drain pan checked · lowest.** Book a visit [What the job involves](https://appliancemaintenance.center/services/condenser-coil-cleaning/) ## True Residential home appliances. True Residential units carry commercial-style cooling into the home, and their undercounter coils and heavy door gaskets need the same regular cleaning a restaurant unit gets. [True Residential home appliance maintenance](https://appliancemaintenance.center/brands/true/) More True Residential codes [Door Ajar Alarm](https://appliancemaintenance.center/error-codes/true-door-ajar-alarm/) Temperature on other makes [Gaggenau Continuous audible signal, door open](https://appliancemaintenance.center/error-codes/gaggenau-wine-door-alarm/) [Hestan dA](https://appliancemaintenance.center/error-codes/hestan-outdoor-cooler-da/) [Liebherr Door open alarm](https://appliancemaintenance.center/error-codes/liebherr-door-open/) [Sub-Zero SERVICE flashing](https://appliancemaintenance.center/error-codes/sub-zero-service-flashing/) [All 6 codes of this kind](https://appliancemaintenance.center/error-codes/#family-temperature) True Residential builds this ### Cold storage Upkeep for everything in the house that keeps things cold: refrigerators, freezers, wine and beverage units and ice makers, cleaned and checked before they start struggling. ## In True Residential's own words > High Temps (1 consecutive hour): 50°F - Refrigerator / 70°F - Wine Cabinet [True Residential 15 & 24 Inch Service Manual](https://true-caliber.com/wp-content/uploads/2020/01/15__24_Inch_Service_Manual_for_Web.pdf) [True Residential 15 & 24 Inch Service Manual](https://true-caliber.com/wp-content/uploads/2020/01/15__24_Inch_Service_Manual_for_Web.pdf) [True Residential 15 & 24 Inch Service Manual](https://true-caliber.com/wp-content/uploads/2020/01/15__24_Inch_Service_Manual_for_Web.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Documented on True Residential's 15 and 24-inch undercounter refrigeration and wine platform; the exact trigger temperature differs between a refrigerator zone and a wine-cabinet zone on the same control board. ## True Residential High Temperature Alarm home appliance maintenance, 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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Make sure the door is fully closed and the gasket is sealing all the way around. If it comes back, it needs a visit. ### Why did my True unit take an hour to alarm after I noticed it felt warm? True's control is built to ignore short-term warming from normal door use; it only raises the High Temperature Alarm once the zone has held its threshold temperature for a full consecutive hour. ### Is a dirty condenser really enough to trigger a True High Temperature Alarm? Yes — True's own service manual lists a dirty condenser coil among the checks for a unit that is not cold enough, and states plainly that warranty does not cover cleaning it, treating it as routine owner upkeep. ### Does the alarm temperature differ between a True wine storage and a True unit? Yes — True documents a lower threshold for a refrigerator zone (around 50°F) than for a wine cabinet zone (around 70°F), reflecting the different set points each is designed to hold. --- **[Read on the site: True High Temperature Alarm: the cabinet has held warm for a full hour](https://appliancemaintenance.center/error-codes/true-high-temperature-alarm/)** **[Book a visit with ApplianceMaintenance.center](https://appliancemaintenance.center/schedule/)**