DCS Cooktop and Rangetop Repair

A gas cooktop or rangetop gives you open flame, fast response and a clear view of what you are cooking, which is why cooks choose it. When a burner sulks, sparks forever or burns with a ragged flame, the whole surface feels unreliable. We repair DCS gas cooktops and rangetops across San Francisco and the Bay Area, from drop-in units in island counters to wide rangetops set into a run of cabinets.

What we see on gas cooktops

A burner will not light

Start with the obvious: a burner cap that sits crooked, an igniter coated in boil-over, or a port packed with dried sauce. If a single burner is silent while its neighbors spark, the fault is local to that burner, such as its igniter, its electrode or its lead. If every burner is silent, we look at the spark module, the switch block or the power to the unit.

Clicking that never stops

A burner that keeps sparking after the flame is established, or sparking that begins by itself when nothing is on, is almost always moisture or residue near an electrode, or a switch that has stuck. Left alone, it wears the module quickly.

Flame that is uneven, yellow or lifts off

Flame shape tells a technician a great deal. Yellow tips suggest a poor air mixture or a dirty burner. A flame that lifts off the ports or roars can mean pressure issues, a wrong orifice after a fuel change or a cap that is not fully seated. Our article on uneven flame on a cooktop burner describes what to look for.

A flame that dies at low setting

If a burner lights, then goes out when turned down, it may lack a good flame sensor or may be fed too little gas at the simmer position. We check the valve, the simmer setting and the burner head for damage.

Knobs, valves and surface wear

Knobs that spin loosely, a valve stem that feels gritty or a stove-top finish that has pitted from salt air are common reasons we are asked to visit. Some of these are cosmetic, and some begin to affect safe operation, so we sort out which is which.

Cooktop installation and why it changes the repair

Where a cooktop is mounted shapes both how it fails and how it is serviced. In an island, the unit sits over cabinets with limited access underneath, and the gas connector and power cord are often routed tightly. We check that the cut-out is the right size, that nothing in the cabinet below touches the burner box and that the flexible connector is not kinked. A unit with a drawer or a shelf too close to the underside can overheat its own components.

Ventilation counts as well. A professional-capacity hood or a downdraft pulling hard can draw the flame sideways or snuff a low burner, especially in a tight apartment with little make-up air. If you have just changed the hood or sealed up an older house, mention it. Our hood repair service covers that side of the system when the hood turns out to be the cause.

Natural gas, propane and conversions

A cooktop is set up for one fuel, and the CDV2-365-N, a 36-inch natural gas model, is an example of a unit labeled by fuel. Switching to propane takes the right conversion parts and orifices. Burners that pop, flutter or refuse to simmer after a conversion usually have a setup problem, not a failed part. If your gas supply changed with a remodel, we check the regulator and the orifice sizes before replacing anything.

Our diagnostic order

1. You describe the symptom and which burners are affected.
2. We inspect the burner caps, heads, ports and electrodes.
3. We test the spark module, switches and wiring, then the supply and fuel setup.
4. We check the clearance around the unit and the ventilation above it.
5. We put the repair in a written estimate and ask for your approval first.

What you can do before we arrive

• Turn the burner off, let it cool, and lift the cap and head to check that they sit flat and are dry.
• Clear the ports gently with a soft brush; do not use a toothpick or pin that could enlarge a hole.
• Check that the breaker feeding the unit is on and that the gas shutoff valve in the cabinet is in its open position, without handling the fitting.
• Wipe the surface and igniter area with a lightly damp cloth once cool, then let it dry fully.
• Note which burners fail and whether the click is quick or constant.

Never remove the control panel or work on gas fittings yourself.

Stop and call for help if

If you smell gas, leave the home, do not use switches or phones inside, and call the gas utility or 911 from outside. Stop using the cooktop if a burner will not shut off, if flame comes from beneath the burner, if you hear a hiss with no flame or if a knob feels hot while the burner is off. Switch off the breaker if you smell burning wiring.

Reading your model label

The label on a cooktop is usually under the surface edge, on the burner box or on the underside, so a photo from the cabinet below is often the easiest approach. Look at our DCS cooktop guide to see how the series are arranged. Units we see include the CT-365BL, a 36-inch Professional drop-in cooktop; the CDU-304 and CDU-365 in the CDU/CDV series, no longer sold new; the CDV2-365-N; and the CP-364GD. The BGC-1236 is another gas cooktop that reaches us. A model number lets us arrive with the correct igniter, electrode and orifice set.

If your cooking surface is part of a full range, you may want the range repair page instead.

How a booking goes

Request a visit, describe the burner problem and share the model if you can. We agree on a time, diagnose before touching a part, and provide a written estimate. You tell us whether to go ahead.

Frequently asked questions