A flame sensor is not a new furnace
The poster child of honest repair.
Five minutes of cleaning versus a replacement quote. We prefer the five minutes when that is the truth.
No heat is usually an ignitor, flame sensor, pressure switch, or thermostat — not an automatic furnace replacement.
The internet version of furnace flame sensor is usually missing a meter reading. Ours is not.
We test ignition, flame proving, inducer, and safety switches. Age is a data point, not a diagnosis.
We map furnace flame sensor to the actual failed part or design limit. Age of the system is a data point, not the diagnosis.
You approve any repair after the findings are written down. Diagnostic visits are a flat $69. New installation estimates are free in-home with a load calculation — not a number invented from square footage on Zillow.
“It’s 15 years old, you need a new system” without readings is a pitch. We show the failed part first.
A company that skips testing on furnace flame sensor will skip it on the next call too. We would rather lose a job than install the wrong thing.
Related service page on this site: furnace repair. The article you are reading is the explanation; that page is how to book the work.
OTTER HVAC is based at 2939 Santos Ln, Walnut Creek. Alameda, Clayton, and Berkeley are regular routes, along with the rest of our listed East Bay cities. Hours are 7am–5pm, seven days a week. We do not advertise 24/7 because we do not staff a night shift.
Inland heat (Pleasanton, Livermore, Concord) and marine air (Alameda, Daly City) are different loads. A note written for Alameda is not automatically right for a fog-belt house. We treat them that way.
Category on this guide: Trust. Primary search phrase: furnace flame sensor.
Call (650) 900-0440 or book online. Tell us the city, the symptom in one sentence, and the brand if you know it. If we have a window today, we will say so. If we do not, we will say that too.
Technicians are EPA 608, OSHA, and NATE certified. Public reviews average 5.0 stars across roughly 146 Google and 151 Yelp reviews. That does not replace a test on your unit.
Related service: Furnace Repair. Book a $69 diagnostic or a free install estimate. Hours: 7:00am–5:00pm, seven days a week. Shop: 2939 Santos Ln, Walnut Creek, CA 94597.
Related: All HVAC guides · Furnace Repair · Pricing and $69 diagnostic · Contact OTTER HVAC
Frequently asked questions
What do you test on a furnace flame sensor visit?
We test ignition, flame proving, inducer, and safety switches. Age is a data point, not a diagnosis. The visit is a flat $69. Repair work starts only after you approve the written findings.
Will you quote furnace flame sensor from a photo?
No. We do not price furnace flame sensor from a driveway photo. $69 diagnostic, then a quote — or a free in-home install estimate if replacement is the honest path.
Do you handle this in Alameda and Clayton?
Yes. We run Alameda, Clayton, and the rest of our East Bay list from 2939 Santos Ln, Walnut Creek. Hours are 7am–5pm every day — not 24/7. Call (650) 900-0440.
Explore related pages
References and credentials
- U.S. DOE Energy Saver
- EPA Section 608
- EPA Section 608 refrigerant certification
- U.S. Department of Energy — Energy Saver
Authority sources: U.S. DOE Energy Saver · EPA Section 608