--- title: "LG range showing F42 | RangeRepair.center" description: "What F42 means on LG ranges, what to check before booking, and when it is not a failure at all." url: "https://rangerepair.center/error-codes/lg-f42/" --- # LG range showing F42 LG uses F42 for a voltage error: the supply reaching the range is outside what the control expects. ## What F42 actually means. LG uses F42 for a voltage error: the supply reaching the range is outside what the control expects. The house wiring or the range connection may be involved. LG range display What to do when F42 shows on the range ### Kind of code Controls and communication The display, the main board or the induction power board lost contact with one another, or one of them failed its own self-check. A power dip, a loose cable or moisture from a boil-over is ruled out before a board is replaced, and a range that keeps heating while this code shows is switched off at the breaker. ### Usually leads to Knobs, switches and controls Knobs that spin or crack, touch keys that do nothing, blank displays, clocks that reset and control boards that switch the wrong thing. ### Shows up as Range Keeps Tripping the Breaker The range breaker trips when you switch on an element, the oven or self-clean, or it trips by itself with the range idle. ### Make LG A Korean electronics group selling freestanding and slide-in ranges on gas, electric and induction, many with Wi-Fi. ### Source LG Help Library "LG Range - Error Codes List" (Wayback copy, 23 Jun 2025) F42 is on LG's Help Library list of range codes, archived on 23 Jun 2025; the list names no models. ## Before you book, in this order. Each step comes from LG's own guidance for F42 on its ranges. Follow it to the end: the last card says whether this is a visit. 01 Switch the breaker off, wait 30 seconds and restore power to clear F42. 02 If F42 returns, leave the breaker off and have the supply and range connection checked. ### Still there? It usually turns into [knobs, switches and controls](https://rangerepair.center/services/knobs-switches-and-controls/). Book with the code and the model number. ### What not to do F42 is not a board error inside the oven; LG links it to voltage. ## What you may notice with it. The range problems F42 tends to arrive with. Answer these at the range before anyone is booked. [All problems](https://rangerepair.center/problems/) Before you call ### [Range Keeps Tripping the Breaker](https://rangerepair.center/problems/range-tripping-breaker/) [All 6 causes, cheapest first](https://rangerepair.center/problems/range-tripping-breaker/) It also comes with - [**Range Error Code**](https://rangerepair.center/problems/range-error-code/) Gas, fire or electrical risk ### Range Keeps Tripping the Breaker 6 causes, cheapest first Where F42 usually leads ## Knobs, switches and controls. **Knobs, keypad or control board · moderate.** Book a visit [What the job involves](https://rangerepair.center/services/knobs-switches-and-controls/) ## LG ranges. A Korean electronics group selling freestanding and slide-in ranges on gas, electric and induction, many with Wi-Fi. [LG range repair](https://rangerepair.center/brands/lg/) More LG codes [F1](https://rangerepair.center/error-codes/lg-f1/) [F4](https://rangerepair.center/error-codes/lg-f4/) [F9](https://rangerepair.center/error-codes/lg-f9/) [F10](https://rangerepair.center/error-codes/lg-f10/) [F3](https://rangerepair.center/error-codes/lg-f3/) [F11](https://rangerepair.center/error-codes/lg-f11/) [F17](https://rangerepair.center/error-codes/lg-f17/) [F27](https://rangerepair.center/error-codes/lg-f27/) [F33](https://rangerepair.center/error-codes/lg-f33/) [F51](https://rangerepair.center/error-codes/lg-f51/) [HS](https://rangerepair.center/error-codes/lg-hs/) [PF](https://rangerepair.center/error-codes/lg-pf/) [All 14 LG codes](https://rangerepair.center/error-codes/#codes-lg) Controls and communication on other makes [AGA FE](https://rangerepair.center/error-codes/aga-fe/) [BlueStar F20](https://rangerepair.center/error-codes/bluestar-range-f20/) [Bosch e005](https://rangerepair.center/error-codes/bosch-e005/) [Café F7](https://rangerepair.center/error-codes/cafe-f7/) [Dacor C-d0](https://rangerepair.center/error-codes/dacor-range-c-d0/) [Electrolux Err](https://rangerepair.center/error-codes/electrolux-err-number/) [Fisher & Paykel F + number](https://rangerepair.center/error-codes/fisher-and-paykel-range-f-number/) [Frigidaire F1](https://rangerepair.center/error-codes/frigidaire-f1/) [All 68 codes of this kind](https://rangerepair.center/error-codes/#family-communication) LG builds this ### Gas range Open flames on top and a gas-fired oven below, all fed by one supply line behind the range and lit by igniters rather than a match. LG builds this ### Electric range Coil elements or radiant elements under a smooth glass top, with an electric oven below, all running on a dedicated 240-volt circuit. LG builds this ### Dual-fuel range Gas burners on top and an electric oven below, the combination most professional-style ranges use, needing both a gas line and a 240-volt circuit. ## In LG's own words > F42 indicates a Voltage Error. [LG Help Library "LG Range - Error Codes List" (Wayback copy, 23 Jun 2025)](https://web.archive.org/web/20250623055649/https://www.lg.com/us/support/help-library/lg-range-error-codes-list--20150154166283) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. F42 is on LG's Help Library list of range codes, archived on 23 Jun 2025; the list names no models. ## LG F42 range 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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Switch the breaker off, wait 30 seconds and restore power to clear F42. If it comes back, it needs a visit. ### Could F42 on my LG range be caused by my home wiring? Yes, LG ties it to voltage, which depends on the circuit feeding the range. An electrician or a technician can measure it at the connection. ### Is it safe to keep using an LG range that shows F42? Treat a voltage warning with caution and leave the breaker off if it keeps returning. Using the range on an unstable supply can damage the boards. --- **[Read on the site: LG range showing F42 | RangeRepair.center](https://rangerepair.center/error-codes/lg-f42/)** **[Book a visit with RangeRepair.center](https://rangerepair.center/schedule/)**