Hearth & Range Service Co. — (904) 478-8963 — Independent Wolf cooking appliance repair, Jacksonville, FL # All-gas range repair Source: https://firstcoastwolf.com/what-we-fix/gas-range/ Updated: 2026-08-10 An all-gas range burns gas on top and in the oven, so the oven has an ignition circuit a dual-fuel range does not. Most of the calls we take on these are ignition timing, blocked ports, or a safety valve that is no longer being told to open. ## Gas top, gas oven, two different ignition problems An all-gas range lights its oven with gas, and that one difference changes the whole diagnostic conversation. On the cooktop, a spark module throws a spark across an electrode gap and the flame either catches or it does not. In the oven, an igniter has to glow hot enough to both ignite the gas and to draw enough current through the safety valve circuit to hold that valve open. It is a clever arrangement and it has one very characteristic failure. An oven igniter does not usually die. It weakens. It still glows, so it looks fine through the vent, but it no longer pulls the current the valve needs to open on time. The result is an oven that takes two, then three, then five minutes to light, and finally lights with an audible thump because gas has had time to collect in the cavity before ignition. Owners often describe this as the oven being slow to preheat. It is not preheating slowly, it is not lighting. If your oven has started doing that, it is worth having looked at sooner rather than later. The delay only ever gets longer. ## The cooktop side Sealed burners are simple and they break in a short list of ways. An igniter that keeps clicking after the flame is up is the call we get most often, and roughly half the time the owner can fix it in two minutes with a paper towel. Something boiled over, liquid wicked down to the electrode, and the module is now blind to a flame that is burning right in front of it. Dry the electrode. Lift the cap and set it back down square. If it still clicks after that, the electrode ceramic is probably cracked and the spark is leaking to ground. Uneven flame is the second. A ring that burns tall on one side and lazy on the other has partially blocked ports, and that is a cleaning job rather than a gas-supply problem. The third is the one that is not a fault at all: a single spark module drives every electrode, so all of them fire when you turn one knob. That is by design. Burner caps are also worth a mention. They are not interchangeable across positions on most ranges, and after a thorough kitchen clean they frequently come back in the wrong spots. A cap on the wrong base sits at the wrong height over the ports and gives you exactly the symptoms of a failing burner. ## Old kitchens, new ranges A good number of these ranges live in kitchens that were not designed around them. The 1900s through 1930s houses in Riverside, Avondale and Old Ortega have cabinet openings that were sized for a 30-inch range, and a 36-inch professional range going into one of them means a cabinet run gets rebuilt. Those installations often end up tight on clearance at the sides and short on air at the back, and a range that cannot breathe runs hot at the control panel and takes its electronics with it eventually. The electrical side surprises people too. An all-gas range still needs power for the spark module, the oven control and the light, and older kitchens frequently do not have a dedicated circuit behind the range. Sharing that circuit with a counter full of small appliances causes intermittent faults that look like a failing board. ## Salt air on the coast The beach ZIPs are hard on ranges in a slow, unglamorous way. Salt gets into hinge pins, into the fasteners along the back panel, and into the burner bases if the cooktop is not wiped. Nothing fails in a single event. Doors simply stop closing quite square, screws round off when someone finally needs to remove them, and stainless pits along the edges where it is never dried. ## Working with an independent shop We are independent. We are not part of any manufacturer service network, which means we tell you what the appliance actually needs. A visit starts with a $129 flat diagnostic, credited toward the repair. You get a written estimate before anything is ordered, we fit genuine OEM parts, and labor is warranted 90 days with parts warranted 365 days. ## Symptoms and what usually causes them - **The oven takes several minutes to light, then lights with a thump** — A tired oven igniter. The igniter is also the current sensor for the gas safety valve, so as it ages it glows without drawing enough current to open the valve promptly. Gas pools while it tries. This one gets worse gradually and is worth fixing before it becomes a no-ignition call. - **The oven does not light at all, but the cooktop burners work** — The cooktop and the oven are on separate ignition systems. A dead oven with live burners usually means the oven igniter has failed open, or the safety valve is not opening. - **The igniter clicks on and on after the burner has lit** — Nearly always a wet electrode or a burner cap seated slightly proud on one side. The spark module keeps firing because it cannot sense a flame that is not sitting where it expects. - **One burner has a ragged flame or will not hold a low simmer** — A blocked port ring from a boil-over, or a cap that has been put back on the wrong base. Burner caps and bases are sized per burner and they do get swapped after cleaning. - **The broiler lights but the flame is patchy across the burner** — Grease and carbon in the broiler ports, or a burner that has warped slightly from repeated heat cycling and no longer sits parallel to the deck. - **There is a faint gas smell for a second or two at ignition** — Usually delayed ignition from a slow igniter or a partially blocked port, which lets a small amount of gas accumulate before the flame catches. It should be looked at rather than lived with. ## Related - /what-we-fix/dual-fuel-range.md - /what-we-fix/rangetop.md - /what-we-fix/ventilation-hood.md - /answers/why-the-igniter-keeps-clicking.md - /answers/fitting-a-range-in-an-old-kitchen.md - /answers/what-the-diagnostic-fee-covers.md --- **Hearth & Range Service Co. — (904) 478-8963** Telephone is how work is booked; there is no form on this site. - Monday – Friday: 8am – 6pm - Saturday: 9am – 4pm - Sunday: Closed - Coverage: 40 miles by road from Fruit Cove, St. Johns County, Florida Hearth & Range Service Co. is an independent appliance repair company. We are not affiliated with, authorized by, or endorsed by Wolf or its parent company. All brand names and model numbers are the property of their respective owners and are used only to identify the appliances we service.