FURN
Home › ServicesHVAC ServicesFurnace Repair & Diagnosis
★★★★★5.0 • 520 Reviews
AVAILABLE NOW • 24/7

FURNACE REPAIR & DIAGNOSIS
IN UTAH — 24/7 SERVICE

When your furnace quits on a sub-zero Utah night, you need fast diagnosis and honest repair — not a pressure sale. Ninja Plumbing, Heating & Air runs full diagnostics, quotes upfront, and dispatches 24/7 across six counties.

Furnace Service Statewide
Same-Day Available
Licensed & Insured
Upfront Pricing
Family Owned
5.0
★★★★★
Average Rating
520
Verified Reviews
120
Min Response Time
24/7
Emergency Dispatch
★★★★★
“Furnace went out overnight. Kary explained everything, fixed the issue same visit, and came back at the end of the day to check one small detail. Patient, thorough, and honest.”
ABOUT THIS SERVICE

FURNACE REPAIR & DIAGNOSIS
FROM UTAH'S LOCAL EXPERTS

Utah winters hit -10°F in the valleys and colder in the mountains. Furnaces cycle hard from November through March — heat exchangers crack from temperature swings, igniters fail on the coldest night, and blower motors wear out after 15 years of elevation stress. We diagnose the full system — gas valve, flame sensor, limit switch, inducer motor, thermostat calibration — and explain what failed before recommending any fix.

We service all residential brands: Lennox, Carrier, Trane, Bryant, Goodman, Rheem, York, American Standard, Amana, Payne, and Heil. Most repairs get done same-visit with parts we carry on the truck. If the furnace is beyond repair or the cost doesn't make sense, we'll walk you through replacement options with real numbers — never pressure you into a bigger system than you need.

We serve Salt Lake County, Utah County, Davis County, Summit County, Wasatch County, and Tooele County. Emergency dispatch runs 24/7/365 with 120-minute response on true no-heat calls. Same-day appointments available most days.
WHAT'S INCLUDED

COMPLETE FURNACE REPAIR & DIAGNOSIS
COVERAGE IN UTAH

From emergency no-heat calls to routine safety checks, we handle every part of residential furnace service. Our licensed techs arrive with tools and parts to fix most issues same-visit.
❄️
Emergency Heating Repair
No heat in January is an emergency. Your family can't wait until morning when overnight temps drop to -10°F. We dispatch 24/7 with 120-minute response across Salt Lake, Utah, and Davis counties. Real people answer the phone — not an answering service — and we arrive with diagnostic tools and parts to restore heat fast, even on holidays.
Call Emergency →
📋
Annual Furnace Tune-Up
Annual fall maintenance catches cracked heat exchangers, worn igniters, and carbon monoxide risks before the first freeze hits. We test for CO leaks, inspect the flame sensor and limit switches, check gas pressure and airflow, clean the burners, and verify safe operation. A tune-up extends furnace life and prevents expensive mid-winter breakdowns. Full 20-point inspection for $69.
Schedule Tune-Up →
🔄
System Replacement
Old furnace beyond repair or over 18 years old? Full system replacement makes sense when repair costs approach half the price of a new unit. We size the new furnace correctly for Utah's elevation and your home's square footage using Manual J load calculations — no guessing on BTU capacity. All city permits handled, installation backed by our satisfaction guarantee.
Get Replacement Quote →
🔍
Independent Second Opinion
Got a quote from another company that feels high, vague, or pushy? We'll inspect the furnace, verify the diagnosis they gave you, and give you an honest second opinion with no upsell pressure. Sometimes the repair is legit — sometimes it's unnecessary. Our flat-rate diagnostic fee applies. You're under no obligation to proceed with repair if you don't want to.
Get Second Opinion →
HOW IT WORKS

OUR FURNACE REPAIR & DIAGNOSIS
PROCESS

STEP 01
CALL OR BOOK
Call (801) 997-1617 or book online. Real people answer 24/7. We'll confirm your appointment window — same-day in most cases, 120 minutes for true emergencies.
STEP 02
DIAGNOSE
A licensed technician runs a complete furnace diagnostic — ignitor, gas valve, flame sensor, heat exchanger, limit switch, blower motor, thermostat — and explains exactly what failed.
STEP 03
UPFRONT QUOTE
You get a flat-rate quote before we touch anything. No surprises. No pressure. If you don't like the number, you only pay the diagnostic fee.
STEP 04
FIXED & VERIFIED
We complete the repair, fire the system, test for proper flame and airflow, and walk you through what was done. Your home heats correctly before we leave.
DO YOU NEED FURNACE REPAIR?

SIGNS YOUR FURNACE
NEEDS ATTENTION

🌡️
No Heat or Weak Heat
If your furnace runs but produces no heat — or the air feels lukewarm instead of hot — it's likely a failed ignitor, bad flame sensor, or gas valve problem. Don't wait until overnight temperatures drop below zero.
Don't ignore this
⚠️
Strange Noises or Smells
Loud banging on startup means delayed ignition (gas buildup). A high-pitched squeal signals blower motor failure. The smell of rotten eggs means a gas leak — shut off the gas and call immediately.
Don't ignore this
💨
Short-Cycling or Won't Stay On
A furnace that starts then shuts off every few minutes — or won't ignite at all — usually has a flame sensor issue, limit switch fault, or cracked heat exchanger. These problems get worse fast and risk carbon monoxide.
Don't ignore this
OUR PROMISE
UPFRONT PRICING.
ZERO SURPRISES.
We diagnose first. We quote flat-rate before touching anything. If you don't like the price, you only pay the diagnostic fee — nothing more. No pressure, no add-ons you didn't ask for, no invoice that catches you off guard.
Flat-Rate Quotes Upfront
No Hidden Fees
100% Satisfaction Guarantee
Licensed & Insured in Utah
Financing Available — $0 Down
Parts Stocked On Our Trucks
CALL (801) 997-1617
NO HEAT EMERGENCY?
CALL NOW FOR 120-MIN RESPONSE
(801) 997-1617
Real people answer 24/7. Real technicians respond fast. Real upfront pricing before we start.
BOOK ONLINE NOW →
WHY CHOOSE NINJA HVAC

WHY UTAH
HOMEOWNERS CHOOSE NINJA

  • Utah state licensed technicians on every call
  • Upfront flat-rate pricing before any work starts
  • Family-owned — we treat your home like our own
  • 24/7 emergency dispatch including holidays
  • Parts stocked on trucks for same-visit repairs
  • 100% satisfaction guarantee on all work
  • Financing available — $0 down, 90% approval rate
  • Technicians Available Now
100%
SATISFACTION GUARANTEE
If you're not happy, we make it right. Period.
CUSTOMER REVIEWS

WHAT OUR
CUSTOMERS ARE SAYING

★★★★★
"These guys are awesome. They came on time and did a great job fixing an issue with my furnace. The workers are honest and won't try to upsell you on something you don't need. I'll definitely be calling them again."
★★★★★
"Josh was polite and thorough. In the moment of frustration, they explained everything and came up with a solution that fit our needs. Got our new furnace and AC installed that same week. Very impressed."
RELATED SERVICES

OTHER NINJA
SERVICES YOU MAY NEED

COMMON QUESTIONS

FURNACE REPAIR & DIAGNOSIS
FREQUENTLY ASKED QUESTIONS

We commit to 120-minute response times for true heating emergencies across Salt Lake County, Utah County, and surrounding areas. Real people answer your call 24/7 — not an answering service — and dispatch immediately. Most customers see us within the hour.

Common repairs range from $155–$500 for minor parts (ignitor, flame sensor, capacitor, pressure switch), to $500–$1,200 for mid-range components (blower motor, gas valve, control board), to $1,200–$2,863 for major repairs like heat exchangers or ECM motors. We provide a flat-rate quote after diagnosis — before we start any work. No surprise fees. If repair doesn’t make financial sense, we’ll tell you honestly.

If your furnace is under 12 years old and the repair is under $500, repair usually wins. If it’s over 18 years old or needs a heat exchanger or major component, replacement often pays back faster through energy savings and reliability. We’ll walk you through both options with real numbers — never pressure you either way.

We service all major residential furnace brands: Lennox, Trane, Carrier, Bryant, Rheem, York, Goodman, American Standard, Amana, Payne, and Heil. Our technicians are Utah state licensed and trained on all residential gas and electric heating systems.

Yes — $0 down financing with a 90% approval rate is available on system replacements and larger repairs. A new furnace or major repair shouldn’t blow your budget all at once. Ask your technician about current financing options when they provide your quote.

Once a year — ideally in fall before cold weather hits. A tune-up catches cracked heat exchangers, worn igniters, and carbon monoxide risks before they cause a breakdown in January. Our annual tune-up includes a full 20-point inspection and CO safety test for $69.

Yes — every technician is Utah state licensed through DOPL (Division of Occupational and Professional Licensing). We carry full liability insurance and workers’ compensation coverage. You’ll never see an unlicensed apprentice working alone on your system.

The most common winter failures are failed igniters (worn out from thousands of heating cycles), dirty flame sensors (can’t detect the pilot flame), cracked heat exchangers (from Utah’s extreme temperature cycling -10°F to 107°F), and blower motor failures. Most of these we catch during fall tune-ups before they cause a no-heat emergency.

Can't find what you're looking for? Call (801) 997-1617 — real people answer 24/7.
SERVICE AREA

WHERE WE OFFER
FURNACE REPAIR & DIAGNOSIS

Mastodon