Arlington (Main Office)
Boost Air And PlumbingArlington, TX
- 2313 Michigan Ct
Arlington, TX 76016 - (817) 839-4672
- Mon–Fri: 8:00 AM – 6:00 PMSaturday: 9:00 AM – 6:00 PMSunday: Closed
Furnace Repair
Furnace Flame Sensor Replacement in Arlington & Grand Prairie, TX
When your furnace kicks on but shuts off after only a few seconds, a fouled flame sensor is likely the culprit. We provide fast diagnostics and replacement for all major brands like Carrier, Rheem, and Lennox to get your heat back on today.
What neighbors say
What Our Customers Are Saying
The Critical Role of Your Flame Sensor
The flame sensor is a thin metal rod that sits directly in the path of the burner flame. Its job is simple but vital: it tells the furnace that a flame is actually present. If the control board does not receive a microamp signal within seconds of the gas valve opening, it kills the power. This prevents your home from filling with unburned natural gas.
Over many DFW winters, these sensors develop a thin layer of oxidation or carbon soot. Even a tiny amount of buildup acts as an insulator, blocking the electrical current. When this happens, your furnace treats a healthy flame as a safety hazard. We see this often on 80% and 95% AFUE units across Tarrant County.
Signs of a Failing Flame Sensor
Short cycling is the most obvious red flag for this specific furnace repair. You will hear the inducer motor start, the ignitor glow, and the flame catch, only for it to vanish five seconds later. This cycle usually repeats three times before the furnace goes into a hard lockout mode. You might see a specific blink code on the furnace control board.
While some homeowners try to DIY this with sandpaper, it is easy to accidentally crack the ceramic housing. A cracked sensor can short out against the furnace chassis, potentially damaging the expensive control board. We use specialized meters to measure the exact microamp output to ensure the part is actually dead before we swap it. This prevents unnecessary parts tossing.
Common Related Furnace Issues We Find
Sometimes a furnace not heating repair involves more than just a dirty sensor. If the sensor is clean but the flame still drops, we may need to look at the furnace ignitor replacement or the ground wire. Proper grounding is essential for the flame rectification process to work. We check the entire ignition circuit during every service call.
If your furnace is older, we might also inspect the furnace blower motor replacement needs. A weak blower can cause the heat exchanger to overheat, which sometimes mimics ignition timing issues. Our technicians check the manifold gas pressure and the burner alignment too. We make sure the flame is actually hitting the sensor where it should.
Expert Service for Every Major Brand
We carry a wide variety of OEM and high-quality universal sensors on our service vans. Whether you have a Trane, Goodman, York, or American Standard, we can usually fix it on the first visit. Our NATE-certified technicians understand the specific tolerances for different brands. We do not use cheap, unbranded parts that fail after one season.
Boost Air And Plumbing has handled furnace repairs in North Texas for over a decade. We are fully licensed by TDLR and maintain an A+ rating with the BBB. Our goal is to get your furnace running safely without selling you parts you do not need. If your furnace is cycling on and off, let us pull the sensor and check the signal.
What you get
- Direct OEM or high-quality universal sensor replacement for lasting reliability.
- Full inspection of the ceramic insulator for cracks or electrical shorts.
- Professional cleaning of the burner assembly to ensure proper signal strength.
- Safety testing of the furnace sequence to confirm reliable gas ignition.
- NATE-certified technician verify millivolt readings meet manufacturer technical specifications.
How it works
- 1We shut off the gas and electrical power to the furnace for safety.
- 2The technician removes the old sensor and inspects the burner for soot.
- 3We install a new sensor and verify the mounting position is correct.
- 4The furnace is powered on to measure the microamp signal to the board.
Related services
Why call us
- • 10+ years in DFW
- • TDLR / TSBPE licensed
- • Flat-rate, written pricing
- • Same-day weekday service
- • Financing on qualifying jobs
FAQs
Frequently asked questions
Need Furnace Flame Sensor Replacement in Arlington or Grand Prairie Today?
Call Boost Air And Plumbing at (817) 839-4672 for fast furnace flame sensor replacement.
ServingArlington HVACandGrand Prairie HVACwith same-day dispatch.