--- title: "Star PREHT on the display: the conveyor toaster or tortilla warmer is preheating" description: "What PREHT means on Star PREHT on the display: the conveyor toaster or tortilla warmer is preheatings, what to check before booking, and when it is not a…" url: "https://commercialappliancerepair.center/error-codes/star-preht/" --- # Star PREHT on the display: the conveyor toaster or tortilla warmer is preheating On Star Holman QCS conveyor toasters, PREHT shows right after the ON/OFF button is pressed; the elements glow while the fan and conveyor wait, and after a few minutes the display moves to the last menu item used. ## What PREHT actually means. On Star Holman QCS conveyor toasters, PREHT shows right after the ON/OFF button is pressed; the elements glow while the fan and conveyor wait, and after a few minutes the display moves to the last menu item used. The RTW tortilla warmers show the same word for a preheat of about twenty minutes, during which the settings should be left alone. Star commercial appliance display What to do when PREHT shows on the commercial appliance ### Kind of code Mode, not a failure Nothing on the unit has broken; the controller is reporting a state it chose or one somebody set. A defrost pauses cooling for a scheduled melt and shows a warmer air reading for a while, a combi asks for a delime or runs its clean cycle and locks the door until it ends, a dish machine or a laundry machine sits in energy save between busy periods, and a door-open reminder beeps after a long delivery. No part is needed: letting the cycle finish, or the key sequence in the manual, brings the unit back. ### Usually leads to No repair Leave the unit to finish its warm-up; on the QCS toaster the fan and conveyor start after about a minute and the menu appears after about four. ### Shows up as Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display A commercial appliance error code appears as letters or numbers on a combi, fryer, reach-in controller, dish machine or laundry machine display, or as a flashing light or an alarm tone. ### Make Star Star equipment is usually checked in the slow window after breakfast, while the cooking surface cools. ### Source Star Holman QCS2 / QCS3 conveyor toaster owner's manual (star-mfg.com) Star Holman QCS2 / QCS3 (QCSe) conveyor toasters with the LED readout, and Star RTW14EA / RTW19EA rolling tortilla warmers. ## Before you book, in this order. Each step comes from Star's own guidance for PREHT on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Leave the unit to finish its warm-up; on the QCS toaster the fan and conveyor start after about a minute and the menu appears after about four. 02 On an RTW tortilla warmer, wait the roughly twenty minutes Star gives and do not change temperature or speed during PREHT. 03 Build the warm-up into opening duties so the first orders do not wait on it. 04 If PREHT never clears, or the elements do not glow, book a visit so the heaters and control can be checked. ### Cleared? The code is gone from the controller, the box pulls down to its set point and holds it, the vat or the cavity reaches temperature and recovers on schedule, the rinse hits its heat and the drum finishes its spin, all without a new part. If the same code comes back within a week, or during the next busy shift, mention it when you book. ### What not to do PREHT is a normal start-up message and not an alarm on either product. A tortilla warmer that is still under 100°F when you check its temperature shows LOW TEMP instead. ## What you may notice with it. The commercial appliance problem PREHT tends to arrive with. Answer these at the commercial appliance before anyone is booked. [All problems](https://commercialappliancerepair.center/problems/) Before you call ### [Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display](https://commercialappliancerepair.center/problems/commercial-error-code/) [All 8 causes, cheapest first](https://commercialappliancerepair.center/problems/commercial-error-code/) Problem ### Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display 8 causes, cheapest first No repair indicated ## Nothing to repair. Nothing on the unit has broken; the controller is reporting a state it chose or one somebody set. A defrost pauses cooling for a scheduled melt and shows a warmer air reading for a while, a combi asks for a delime or runs its clean cycle and locks the door until it ends, a dish machine or a laundry machine sits in energy save between busy periods, and a door-open reminder beeps after a long delivery. No part is needed: letting the cycle finish, or the key sequence in the manual, brings the unit back. [How to read what your commercial appliance is telling you](https://commercialappliancerepair.center/problems/commercial-error-code/) ## Star commercial appliances. Star equipment is usually checked in the slow window after breakfast, while the cooking surface cools. [Star commercial appliance repair](https://commercialappliancerepair.center/brands/star/) More Star codes [COOL DOWN](https://commercialappliancerepair.center/error-codes/star-cool-down/) [LOW TEMP](https://commercialappliancerepair.center/error-codes/star-low-temp/) [CLEAN WAIT](https://commercialappliancerepair.center/error-codes/star-clean-wait/) Mode, not a failure on other makes [Alto-Shaam E100](https://commercialappliancerepair.center/error-codes/alto-shaam-e100/) [Beverage-Air dEF](https://commercialappliancerepair.center/error-codes/beverage-air-def/) [Cleveland SURECOOK light](https://commercialappliancerepair.center/error-codes/cleveland-surecook-light/) [Continental Refrigerator PG](https://commercialappliancerepair.center/error-codes/continental-refrigerator-pg/) [Delfield dEF](https://commercialappliancerepair.center/error-codes/delfield-def/) [Dexter PUSH](https://commercialappliancerepair.center/error-codes/dexter-push/) [Frymaster E39](https://commercialappliancerepair.center/error-codes/frymaster-e39/) [Hatco Lo](https://commercialappliancerepair.center/error-codes/hatco-lo/) [All 27 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-mode) Star builds this ### Commercial cooking equipment Fryers, griddles, charbroilers, restaurant ranges, convection and combi ovens, steamers, kettles, holding cabinets and toasters, on gas or electric, that make up the hot side of a kitchen line. ## In Star's own words > PREHT will be displayed (the elements will begin to glow but the conveyor and fan motor will not [Star Holman QCS2 / QCS3 conveyor toaster owner's manual (star-mfg.com)](https://star-mfg.com/wp-content/uploads/2017/01/QCS2-QCS3-Holman-Conveyor-Toaster_Owners-Manual-01-2015.pdf) [Star RTW14EA / RTW19EA rolling tortilla warmer owner's manual (star-mfg.com)](https://star-mfg.com/wp-content/uploads/2020/08/C_RTW_RTW14EA_Rolling-Tortilla-Warmer_Owners-Manual_2M-Z19213_Rev-I_8-20.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Star Holman QCS2 / QCS3 (QCSe) conveyor toasters with the LED readout, and Star RTW14EA / RTW19EA rolling tortilla warmers. ## Star PREHT commercial appliance 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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Leave the unit to finish its warm-up; on the QCS toaster the fan and conveyor start after about a minute and the menu appears after about four. ### How long does PREHT last on a Star QCS conveyor toaster? Star describes about four minutes: the elements heat first, the fan and conveyor start after one minute, and the last-used menu item appears after four. ### Why is the conveyor not moving during PREHT? That is by design on the QCS toaster. The conveyor and fan wait for the first minute while the elements start heating. ### Can we change settings while a Star tortilla warmer shows PREHT? Star says not to adjust temperature or speed until the preheat has finished. Wait for TORT to show, then make changes. --- **[Read on the site: Star PREHT on the display: the conveyor toaster or tortilla warmer is preheating](https://commercialappliancerepair.center/error-codes/star-preht/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**