--- title: "Simmer will not hold" description: "Viking simmer will not hold — a burner that will not stay lit on its lowest setting, or a \"low\" that is still hot enough to boil." url: "https://vikingmiami.support/symptoms/range-simmer-not-working/" date_modified: "2026-08-21" --- # Simmer will not hold Symptom # Viking simmer will not hold A burner that will not stay lit on its lowest setting, or a “low” that is still hot enough to boil. On professional equipment the simmer is a specification rather than an afterthought, and a burner that has lost it can be brought back. - **From $95** diagnostic, credited to the repair - **59** cities and neighborhoods covered - **OEM** parts available on order - **In writing** the price, before anything is opened ## Book a diagnostic visit Your model number and a line about what it is doing is enough to get started. Your details stay private. No spam, ever. Five ordinary causes ## What this usually turns out to be Cheapest and commonest first, which is also the order we check them in. They sit hundreds of dollars apart, and only the unit settles which one is yours. - The valve out of adjustment Gas valves have a low-flame setting and it drifts. It is an adjustment rather than a part, and it is what most of these turn out to be. [ Sealed burner & igniter repair from $165 ](https://vikingmiami.support/services/sealed-burner-and-igniter-repair/) ### The valve out of adjustment Gas valves have a low-flame setting and it drifts. It is an adjustment rather than a part, and it is what most of these turn out to be. - Ports partly blocked At full power a blocked ring still looks fine. At simmer there is not enough flame left to bridge the gaps. [ Open burner repair from $175 ](https://vikingmiami.support/services/open-burner-repair/) ### Ports partly blocked At full power a blocked ring still looks fine. At simmer there is not enough flame left to bridge the gaps. - Flame sensing at low flame The control loses sight of a small flame and closes the valve. That is the version that dies under a lid. [ Sealed burner & igniter repair from $165 ](https://vikingmiami.support/services/sealed-burner-and-igniter-repair/) ### Flame sensing at low flame The control loses sight of a small flame and closes the valve. That is the version that dies under a lid. - The burner head seated wrong Off by a fraction, a burner will run at full power and refuse to simmer, which is a confusing way for it to present. [ Open burner repair from $175 ](https://vikingmiami.support/services/open-burner-repair/) ### The burner head seated wrong Off by a fraction, a burner will run at full power and refuse to simmer, which is a confusing way for it to present. - Gas pressure Low supply pressure shows at the bottom of the range before it shows anywhere else, and it affects every burner rather than one. [ Appliance installation from $225 ](https://vikingmiami.support/services/appliance-installation/) ### Gas pressure Low supply pressure shows at the bottom of the range before it shows anywhere else, and it affects every burner rather than one. In five minutes ## Before you call anybody None of it needs tools, and all of it makes the visit shorter. - 01 One burner or all of them All of them at once points at supply pressure. One points at that burner or its valve. ### One burner or all of them All of them at once points at supply pressure. One points at that burner or its valve. - 02 With a lid and without Dropping out under a lid is flame sensing. Never going low at all is the valve. ### With a lid and without Dropping out under a lid is flame sensing. Never going low at all is the valve. - 03 Clean the ring first Ten minutes on an open burner, and it is the free version of this repair. ### Clean the ring first Ten minutes on an open burner, and it is the free version of this repair. - 04 Note whether it was ever good A range that has never simmered properly since installation is a different conversation from one that has lost it. ### Note whether it was ever good A range that has never simmered properly since installation is a different conversation from one that has lost it. How it shows up ## What people describe when they call - “The flame goes out at the lowest setting” - “Low is far hotter than it used to be” - “It holds until a lid goes on, then drops out” A shortcut ## Narrow it down before anybody arrives A description of the behaviour leaves a few possible causes. A code names the subsystem before anybody opens anything, which is why it is worth photographing before it clears. If there is no code at all The data plate is inside the cabinet, upper left wall or behind the grille. [ All models ](https://vikingmiami.support/models/) In more detail ## About Viking simmer will not hold ### The fastest diagnosis is the code Try it with and without a lid. A burner that holds a simmer uncovered and drops out under a lid is a different condition from one that will not go low at all, and knowing which halves the diagnosis before anybody drives out. ### Simmer is what this equipment was bought for A professional burner is expected to go from a rolling boil to a genuine simmer without a diffuser, and losing that is losing a real part of the appliance. It is also one of the more satisfying repairs on the list, because it is usually an adjustment rather than a part. ### Three conditions that look alike A valve that will not go low, a ring too blocked to sustain a small flame, and a control that cannot see one — all three present as “it will not simmer”. The lid test and the burner-by-burner test separate them in about five minutes. This article is based on: - Official manufacturer documentation - Internal repair procedures - Technician repair history - Company quality standards Before you book ## Questions about viking simmer will not hold Yes. There is a low-flame adjustment on the valve and it is part of what setting up this equipment properly involves. A burner that has drifted can usually be brought back without a part. That is flame sensing rather than the valve. The control has lost sight of a small flame under a covered pan and closed the gas. Specific, and fixable. Then look at the supply rather than at the range. Pressure shows itself at the bottom of the range first, and a whole-top change points outside the appliance. 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