From the open-burner RGTNB models to Precision cooktops, we diagnose weak flames, dead sparkers, and clogged brass burners on-site. Independent, honest, and calibrated for Littleton's 5,350-ft altitude.
BlueStar builds commercial-style equipment for the home, and that changes how it fails and how it should be fixed.
BlueStar's open-burner design is the heart of the brand. Unlike sealed consumer burners, the RGTNB and Precision cooktop series use cast-brass, open-flame burners rated up to 25,000 BTU with a low simmer setting that relies on a separate simmer burner ring. That raw output is what cooks love, but it also means food debris, boil-overs, and grease fall directly onto the burner ports and the spark electrodes rather than being sealed off.
Because these are gas units with high BTU ratings, they are sensitive to the air-to-fuel mixture. At Littleton's elevation of roughly 5,350 feet there is less oxygen per cubic foot, so a BlueStar burner that ran clean at sea level can show a lazy yellow flame, sooting, or a burner that will not hold a low simmer here. Correct altitude setup often matters as much as any single failed part.
These are the symptoms Littleton BlueStar owners call us about most often:
Every visit starts with the same structured $89 diagnostic so nothing gets guessed at.
We verify manifold gas pressure, then test each spark electrode and the shared ignition module to isolate whether the fault is a single burner or the whole sparker circuit.
We pull the cast-brass burner caps and heads, clear clogged ports, and check the electrode gap and ceramic insulator for cracks or the grease bridging that causes non-stop clicking.
We watch the flame cone on high and simmer, then confirm the air shutter and any orifice sizing are correct for our 5,350-ft elevation so the burner runs clean and holds a low simmer.
We replace the failed electrode, igniter module, gas valve, or burner component with OEM-quality, factory-specified parts and retest every burner before we leave.
On sealed cooktops a bad ignition is almost always electrical. On a BlueStar open burner, the same clicking-that-won't-stop symptom is very often mechanical: a boil-over has bridged the spark electrode to the burner head, so the module keeps firing.
That is why we do not just swap a part and leave. We clean the burner ports, dry and re-seat the electrode, and confirm the correct spark gap. In dry, dusty Front Range conditions, ceramic insulators also crack more readily, so we inspect each one rather than assuming the module is at fault.
We stock and source factory-specified components for the RGTNB, RCT, and Precision cooktop lines:
The ignition electrode and multi-burner spark module are the most frequent culprits behind failed lighting and endless clicking.
Warped or port-clogged cast-brass burners cause uneven flames; genuine replacements restore the full BTU output.
Stiff knobs and simmer problems often trace to a worn burner valve or an orifice that needs correct altitude sizing.
Quick Answers
On BlueStar open burners, non-stop clicking is usually a spark electrode that has been soaked or bridged by a boil-over, or a cracked ceramic insulator, rather than a failed part. The module keeps firing because it thinks the burner has not ignited. Cleaning and drying the electrode fixes most cases, and we confirm the correct spark gap before leaving.
We charge an $89 diagnostic service-call fee that is credited toward the repair, and we give a firm price after we inspect the cooktop on-site. Common repairs like a spark electrode or burner cleaning start lower than a gas valve or ignition module replacement. Call (720) 903-2603 for a starting estimate for your model.
BlueStar's high-BTU open burners depend on a correct air-to-fuel mixture, and Littleton's roughly 5,350-ft elevation means thinner air that can cause a lazy flame or a simmer that blows out. Correcting the air shutter and confirming proper orifice sizing for altitude usually restores a stable low flame. An independent tech familiar with local elevation is the fastest fix.
FAQ
Anything else — call any hour, a real person answers.
Yes. We repair the drop-in BlueStar cooktops as well as the open-burner rangetop (RGTNB and RCT) series, since they share the same brass burners, spark electrodes, and ignition modules. Let us know your model when you book so we bring the right parts.
No. We are an independent appliance repair company serving Littleton since 2014, not authorized or certified by BlueStar. We use OEM-quality, factory-specified parts and are upfront about that so you know exactly who is working on your cooktop.
Usually, yes. A yellow flame typically means the air-to-fuel mixture is off, the burner ports are clogged, or the setup is not calibrated for altitude. We clean the burner, adjust the air shutter, and confirm the flame burns a clean blue before we finish.
We serve Littleton plus Ken-Caryl, Columbine, Chatfield, Roxborough Park, and the southwest Denver metro within about 25 miles. Phone support is answered 24/7 at (720) 903-2603, and service visits run daily from 8:00 AM to 6:00 PM.
Answered 24/7 · $89 diagnostic credited to the repair
Book OnlineReviews
Our built-in Sub-Zero was keeping the freezer fine but the upper fridge zone was sitting around 55. Turned out to be the dual-evaporator setup, exactly what the tech guessed on the phone. Brian had the sealed system diagnosed the first visit, ordered the part, and had us back to normal within the week. He didn't try to sell us a new unit like the last place did.
One of the dual-stack burners on our Wolf range would click and click but never light. He mentioned it's common up here because the burners need to be calibrated for the altitude, which no one had ever told us. Relit perfectly after and he adjusted the others while he was at it.
Fixed our Sub-Zero the same week we called. Fair price, no upsell.
Our dual-zone wine cabinet had drifted so the bottom zone wouldn't hold temp and there was condensation collecting on the glass. They diagnosed it quickly but the part had to come from the manufacturer and took about four days, so we were without it for most of a week. Once it arrived the fix was solid and both zones are holding right where they should. Worth the wait, just be ready for the parts delay on these.
Miele dishwasher wouldn't drain, standing water in the bottom every cycle. Bad drain pump. In and out in about an hour and he cleaned out the filter housing that was part of the problem too.
The door gasket on our 15-year-old Sub-Zero had gotten brittle and it was sweating around the seal. New OEM gasket and it seals like new again. Appreciated that they used the factory part instead of some universal thing.
Thermador wall oven quit heating right before we were hosting. Called in the morning and they got someone out that same afternoon. Bad igniter. He had the part on the truck and we still made our dinner.
Ice maker in our Sub-Zero was making cloudy hollow cubes and barely any of them. He flushed the system, replaced a valve, and now it actually keeps up when we have people over. Nice guy, wore booties in the house without being asked.
Solid work on our Bosch dishwasher, the drain pump had failed. The only thing is the $89 service call fee felt a little steep before I knew they credit it toward the repair. Once I proceeded it came off the bill, so no real complaint, just wish I'd understood that up front.
Our Viking freezer was building up a wall of frost and not defrosting on its own. Turned out to be the defrost heater. Fixed it and explained what was going on so I understood why it happened.
Two burners on our Wolf cooktop wouldn't spark. Tech recalibrated them for the elevation and swapped the igniters. Works better than it has in years honestly.
Warm upper zone on our Sub-Zero, classic apparently. They knew exactly what it was, ordered the evaporator part, and came back to install it a couple days later. Honest and easy to deal with the whole way through.
Not many people around here will even touch a Gaggenau. These guys did, got the control board sorted, and were straight with me about the cost of the part on a unit this expensive.
Miele steam oven throwing an error and shutting off mid-cook. The tech was great and clearly knew the unit, but he ran about 40 minutes behind the window they gave me and I had to shuffle some things around. Fixed it in one visit though and it's been perfect since, so I'd still call them again.
Had them out for our built-in outdoor grill that wasn't lighting evenly. Didn't expect them to do outdoor units but they did and dialed it in for the altitude. Grilling season saved.
Quick, clean, and they answered when I called at 9pm the night before. Dishwasher's draining again.
This was a big one, the sealed system on our Sub-Zero failed and that's a job a lot of shops won't take on. They did it right, used factory-spec parts, and stood behind the work. Given it's a $12k built-in I'm glad I found someone who actually knew these inside and out instead of just replacing the whole fridge.
Wine fridge kept fogging up on the door and the temp was bouncing around. Fixed same visit and no more condensation.