--- title: "Fontana Forni Er4: the Volta pizza oven reads too cool for five minutes" description: "What Er4 means on Fontana Forni Er4: the Volta pizza oven reads too cool for five minutess, what to check before booking, and when it is not a failure at all." url: "https://pizzaovenrepair.center/error-codes/fontana-forni-er4/" --- # Fontana Forni Er4: the Volta pizza oven reads too cool for five minutes After lighting, the Volta expects its chamber probe to see the temperature rise. ## What Er4 actually means. After lighting, the Volta expects its chamber probe to see the temperature rise. If the reading stays under 43°C (110°F) for more than five minutes, it shows Er4. Fontana's cause is a probe that is no longer in its proper position inside the cooking chamber, so it is reading air or metal away from the heat. Fontana Forni pizza oven display · also shown as ER4 What to do when Er4 shows on the pizza oven ### Kind of code Temperature and sensors A probe is handing the controller a reading it cannot believe, or none at all: a deck or tunnel sensor coated in baked-on flour and grease, its lead chafed or scorched where it passes the heat, or a connector loosened by years of doors slamming. The oven then runs hot, stalls short of its setting or shuts the heat off to protect itself. Letting the oven cool and restarting it is reasonable; a sensor that still reads wrong sits behind a panel, and that is a visit. ### Usually leads to Pizza oven thermostat and control repair Thermostats calibrated or replaced, probes, timers, boards and displays repaired, so the pizza oven holds the temperature the cooks set and shows the right number. ### Shows up as Pizza Oven Error Code on a Deck, Conveyor or Rapid-Cook Display A pizza oven error code shows as letters or numbers on the display of a conveyor, deck or rapid-cook oven, a flashing light on its panel, or a message about ignition, heat, belt or airflow. ### Make Fontana Forni A Fontana Forni visit leaves time for the door and the dial thermometer, two small parts that decide whether an owner trusts the fire at all. ### Source Fontana Forni Volta 70 and 90 manual, USA and Canada edition, troubleshooting error code table Volta 70 and Volta 90 smart gas ovens, USA and Canada manual. The threshold is printed as 43°C (110°F) for more than five minutes. ## Before you book, in this order. Each step comes from Fontana Forni's own guidance for Er4 on its pizza ovens. Follow it to the end: the last card says whether this is a visit. 01 Hold the power button for three seconds to clear the code and switch off. 02 When the oven is cold, check whether the probe inside the chamber has been pushed back, bent or pulled from its mount. 03 Before the next try, watch the flame icon: it should turn steady within ten seconds, which tells you the burner itself is lit. 04 If the probe has moved and cannot simply be set back in its mount, book a visit to have it repositioned and secured. ### Still there? It usually turns into [pizza oven thermostat and control repair](https://pizzaovenrepair.center/services/pizza-oven-thermostat-and-control-repair/). Book with the code and the model number. ### What not to do Er4 does not report an empty tank; gas running out during cooking shows Er6. It is also not the missing-probe message Er1, which means the probe cannot be read at all. ## What you may notice with it. The pizza oven problems Er4 tends to arrive with. Answer these at the pizza oven before anyone is booked. [All problems](https://pizzaovenrepair.center/problems/) Before you call ### [Pizza Oven Error Code on a Deck, Conveyor or Rapid-Cook Display](https://pizzaovenrepair.center/problems/pizza-oven-error-code/) [All 7 causes, cheapest first](https://pizzaovenrepair.center/problems/pizza-oven-error-code/) It also comes with - [**Pizza Oven Not Getting Hot Enough to Bake a Crisp Crust**](https://pizzaovenrepair.center/problems/pizza-oven-not-getting-hot/) Problem ### Pizza Oven Error Code on a Deck, Conveyor or Rapid-Cook Display 7 causes, cheapest first Where Er4 usually leads ## Pizza oven thermostat and control repair. **Thermostat calibrated or replaced, temperature probe, timer, controller board or display · moderate.** Book a visit [What the job involves](https://pizzaovenrepair.center/services/pizza-oven-thermostat-and-control-repair/) ## Fontana Forni pizza ovens. A Fontana Forni visit leaves time for the door and the dial thermometer, two small parts that decide whether an owner trusts the fire at all. [Fontana Forni pizza oven repair](https://pizzaovenrepair.center/brands/fontana-forni/) More Fontana Forni codes [Er1](https://pizzaovenrepair.center/error-codes/fontana-forni-er1/) [Er2](https://pizzaovenrepair.center/error-codes/fontana-forni-er2/) [Er3](https://pizzaovenrepair.center/error-codes/fontana-forni-er3/) [Er 5](https://pizzaovenrepair.center/error-codes/fontana-forni-er5/) [Er6](https://pizzaovenrepair.center/error-codes/fontana-forni-er6/) [Er7](https://pizzaovenrepair.center/error-codes/fontana-forni-er7/) [Er8](https://pizzaovenrepair.center/error-codes/fontana-forni-er8/) [noP](https://pizzaovenrepair.center/error-codes/fontana-forni-nop/) [Flashing flame icon](https://pizzaovenrepair.center/error-codes/fontana-forni-flashing-flame-icon/) [Flashing Wi-Fi indicator](https://pizzaovenrepair.center/error-codes/fontana-forni-flashing-wi-fi-indicator/) Temperature and sensors on other makes [Marra Forni Open](https://pizzaovenrepair.center/error-codes/marra-forni-open/) [Middleby Marshall PROBE # OPEN](https://pizzaovenrepair.center/error-codes/middleby-marshall-probe-open/) [TurboChef F2](https://pizzaovenrepair.center/error-codes/turbochef-f2/) [Wood Stone open](https://pizzaovenrepair.center/error-codes/wood-stone-open/) [All 14 codes of this kind](https://pizzaovenrepair.center/error-codes/#family-temperature) Fontana Forni builds this ### Outdoor gas pizza oven A stainless pizza oven on a counter, a cart or set into masonry, fired by propane or natural gas under a stone floor and a low insulated dome. Fontana Forni builds this ### Wood-fired pizza oven A refractory dome over a firebrick or cast hearth, fired with wood and often a gas burner too, with a chimney, a door and thick insulation around it. ## In Fontana Forni's own words > The temperature inside the oven below 43°C (110°F) for more than five minutes. [Fontana Forni Volta 70 and 90 manual, USA and Canada edition, troubleshooting error code table](https://cdn.shopify.com/s/files/1/0599/2356/2589/files/Manuale_VOlta_ENG-FRA_USA_CANADA_041225.pdf) [Fontana Forni Volta 70 and 90 manual, USA and Canada edition, troubleshooting error code table](https://cdn.shopify.com/s/files/1/0599/2356/2589/files/Manuale_VOlta_ENG-FRA_USA_CANADA_041225.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Volta 70 and Volta 90 smart gas ovens, USA and Canada manual. The threshold is printed as 43°C (110°F) for more than five minutes. ## Fontana Forni Er4 pizza oven 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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Hold the power button for three seconds to clear the code and switch off. If it comes back, it needs a visit. ### My Volta flame is lit but it still shows Er4. How? Er4 is about what the probe reads, not whether there is flame. A probe knocked out of its position can sit in a cool spot and report under 110°F while the burner is running. ### Can cold weather cause Er4 on a Fontana Volta? Fontana's listed cause is the probe position, not the weather. A healthy Volta with a properly seated probe should pass 110°F well within five minutes of lighting. ### How does the Er4 probe on a Volta get moved? Usually by a peel, a pan or cleaning inside the chamber. Fontana's fix is to put the probe back in its original place and secure it with its screws. --- **[Read on the site: Fontana Forni Er4: the Volta pizza oven reads too cool for five minutes](https://pizzaovenrepair.center/error-codes/fontana-forni-er4/)** **[Book a visit with PizzaOvenRepair.center](https://pizzaovenrepair.center/schedule/)**