Furnace down? Same-day diagnostic and repair across King, Pierce & Snohomish.
Furnace Diagnostic
We diagnose the real problem.
Real diagnosis before any repair.
The symptom isn't the whole story. Here's what's actually happening.
Not sure what's wrong? Book a diagnostic — we'll tell you exactly what's happening.
Sound familiar? We've seen them all. We fix them all.
Failed ignitor, tripped safety, or gas valve.
Clicks but no flame. Usually a worn ignitor or flame sensor.
Gas, burning, or musty smell. Possible leak, overheating, or dirty filter.
Delayed ignition or duct expansion from pressure changes.
On-off every few minutes. Overheating, dirty filter, or bad sensor.
Should be blue. Yellow means incomplete combustion. CO risk.
Fan won't quit. Stuck relay, wiring, or limit switch.
Bills creeping up? Dirty burner, failing heat exchanger, or airflow issue.
"Furnace died on the coldest night of the year. Called Next Phase first thing in the morning, tech was here by 11am. Bad ignitor — replaced it on the spot. Heat was back before lunch."
"Smelled something weird from the vents. Another company said we needed a new furnace. Next Phase found a cracked inducer motor and fixed it for way less. Honest guys."
"Our furnace was short cycling every few minutes. The tech cleaned the flame sensor and checked everything else while he was at it. Runs perfectly now. Fair price, no upselling."
"Upfront pricing before any work started. The tech explained exactly what was wrong with our blower motor and what it would cost. No games, no pressure. We'll use them again."
"Loud banging every time the furnace kicked on. Turned out to be delayed ignition from dirty burners. Quick clean and adjustment — been quiet ever since. Great technician."
"Furnace died on the coldest night of the year. Called Next Phase first thing in the morning, tech was here by 11am. Bad ignitor — replaced it on the spot. Heat was back before lunch."
"Smelled something weird from the vents. Another company said we needed a new furnace. Next Phase found a cracked inducer motor and fixed it for way less. Honest guys."
Usually same day. Trucks stocked with common parts. Morning call, afternoon arrival.
Yes. Carrier, Trane, Lennox, Goodman, Rheem, York, Bryant — every major brand. Any age, any installer.
After the diagnostic, we'll give you the straight answer. No pressure either way.
Always. Exact price before work starts. Decline and you only pay the diagnostic fee.
All repairs guaranteed. Same issue returns? We come back at no charge. We also check manufacturer warranty before any work.
Small problems get expensive fast. Book a diagnostic. Upfront pricing.
Same-day service · All brands · Upfront pricing · Repair guaranteed