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Davis & Salt Lake County

(385) 865-6749
CMB HVAC — Utah's Local HVAC

Furnace Maintenance

Furnace Maintenance Focused on Safe, Reliable Operation

A furnace tune-up should verify more than whether the burners light. CMB HVAC checks the operating sequence, safety controls, airflow, electrical condition, venting, and combustion-related items appropriate to the equipment, then documents what needs attention.

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Furnace Maintenance Focused on Safe, Reliable Operation

The checklist is printed below because 'tune-up' should mean something specific: the full operating sequence exercised, safety controls tested, venting checked, electrical connections and amp draws measured, temperature rise verified, and — on condensing furnaces — the condensate system serviced. What we find goes in writing, sorted into what needs attention, what's worth planning for, and what can wait.

What maintenance isn't: a guarantee. It cannot promise that nothing will fail this winter, and no honest company claims it prevents every carbon-monoxide risk. What it genuinely does is catch the developing problems — the dirty flame sensor, the drifting pressure switch, the filter choking airflow — while they're still cheap, and document your furnace's condition so changes are visible year over year.

Measured, Tested, Documented

  • The actual checklist

    Every item below is performed and initialed — not a '21-point inspection' with no definitions behind the number.

  • Sequence-tested, not glanced

    The furnace runs a complete cycle with us watching: draft, ignition, proof, warm-up, blower, shutdown.

  • Findings in writing

    Measurements and photos come home with you — and give next year's visit a baseline to compare against.

  • Booked before the cold

    September and October slots are open; January slots belong to breakdowns. Membership visits schedule themselves ahead.

When to Schedule Furnace Maintenance

  • Early fall, every year

    September through October along the Wasatch Front — before the first hard freeze that turns worn parts into no-heat calls.

  • The first cold snap is coming

    If you missed fall, book anyway — a mid-season tune-up still beats waiting for the furnace to choose its own moment.

  • Something's changed

    New noises, a smell on first ignition, uneven rooms, rising gas bills — the tune-up is the honest way to find out what changed.

  • Buying or selling the home

    A documented furnace condition report is worth more in a transaction than any amount of 'it works fine.'

What a Furnace Tune-Up Includes

Stated plainly — and what's quoted separately is stated separately.

  • Thermostat, controls, and the complete operating sequence exercised
  • Electrical connections checked and tightened; amp draws measured against nameplate
  • Ignition system and flame signal tested and recorded
  • Burners and burner condition inspected
  • Safety controls tested: limit, pressure switch, flame proofing
  • Venting and intake/exhaust terminations visually verified
  • Blower, filter condition, temperature rise, and airflow measured
  • Condensate drain and trap serviced on condensing (90%+) furnaces

How the Tune-Up Visit Runs

  1. Start the conversation

    Anything you've noticed — noises, smells, cold rooms — steers the inspection before the first panel comes off.

  2. Run the sequence

    A complete heating cycle with the meters attached: draft proven, ignition timed, flame signal read, safeties proven.

  3. Measure the air side

    Filter checked, blower measured, temperature rise compared to nameplate — the numbers that decide comfort and bill size.

  4. Service the small stuff

    Condensate flushed, connections tightened, flame sensor cleaned when readings call for it — included in the visit.

  5. Report & priorities

    Findings sorted into now / plan / monitor, in writing, with photos. Repairs are always a separate written quote.

One-Time Tune-Up or Membership

Same checklist, same report — the difference is what happens next season.

  • One-time tune-up

    A single preseason visit, booked when it suits you. Full checklist, written report, baseline on file for future comparison.

    Best for: newer furnaces and recent inspections

  • Maintenance membership

    Furnace before winter, AC before summer — both visits booked ahead of the rush automatically, with history building year over year.

    Best for: furnaces you plan to rely on for years

  • Repair-only

    Some homeowners skip maintenance and call when something fails. We'll always take the call — but the January version costs more than the October one.

    Best for: nobody, honestly — but the choice is yours

Technician inspecting a furnace with a flashlight in a tight utility space
The parts that matter most are the ones you can't see from the hallway — so we look, and we write down what we saw.

What the Tune-Up Covers — and What It Doesn't

Maintenance and repair are different jobs. The visit price covers inspection, standard cleaning, and the report — here's the line.

  • Included: the full inspection

    Every check on the list, with the operating sequence exercised and readings recorded.

  • Included: standard service

    Condensate flush on condensing furnaces, flame sensor cleaning when readings call for it, connections tightened.

  • Quoted separately: repairs

    A worn igniter, a failing pressure switch, a blower on its way out — each gets its own written flat-rate quote. Never auto-billed.

  • Quoted separately: restoration

    Venting corrections, drainage rework, or heavy cleaning beyond standard scope are quoted as their own jobs.

We won't promise that maintenance prevents every breakdown or eliminates every safety risk — anyone who promises that is selling. The honest value: documented condition, verified safe operation on the day, and early identification of developing problems while they're still inexpensive. Filters are checked during the visit; replacement filters for standard sizes are available on request and quoted separately.

From Doorstep to Report

  1. Protect & ask

    Floor protection down, and a conversation about what you've noticed this year — your observations are data.

  2. Test & measure

    The full sequence with instruments attached, plus the air side: filter, blower, temperature rise.

  3. Clean & adjust

    Condensate flushed, flame sensor serviced when needed, connections tightened — the included scope.

  4. Report & next steps

    Now / plan / monitor in writing with photos. If a repair is worth doing, it's a written flat-rate option, your call.

Why Fall Is the Season Along the Wasatch Front

Utah's heating season is long, dry, and dusty, and it arrives with a hard first freeze that turns marginal furnaces into service calls overnight. September and October are the months when a tune-up can actually prevent a January problem: appointment times are flexible, the weather is forgiving if anything needs follow-up, and the report leaves time to schedule any repair on your terms instead of the storm's.

  • Best window: September through early November
  • Dust and inversion season load filters fast — mid-winter checks are worth it on busy households
  • Condensing furnaces (90%+) need their condensate looked at before freezing weather — trapped water and cold garages don't mix

Related Services & Pages

Furnace Maintenance Questions, Answered

What is included in furnace maintenance?
The complete checklist is printed above; the honest summary is that we exercise the entire operating sequence with instruments attached, test every safety control, verify venting, measure electrical draws and temperature rise, service the condensate system on condensing furnaces, and hand you the findings in writing. Standard cleaning and minor service (flame sensor, condensate, connections) are included. Repairs are always a separate written quote — a tune-up never turns into a bill without your approval.
When should I schedule a tune-up?
Fall — September through early November along the Wasatch Front. You get your pick of appointment times, any repair the report finds can be scheduled on your terms, and the furnace enters the first hard freeze with its safeties proven. That said, the second-best time is now: a January tune-up still documents condition and catches developing problems, even if it can't retroactively prevent the cold snap.
Does a tune-up include cleaning the burners?
Burners are inspected as part of the visit, and standard cleaning — what the burner design allows without disassembly beyond scope — is included when condition calls for it. What's quoted separately is restoration: burners with heavy corrosion or rust-out, combustion chambers needing real cleaning, or venting that needs correction. The report tells you which category your furnace falls into, with photos, before you're asked to decide anything.
Will maintenance detect a cracked heat exchanger?
The inspection includes examining the areas of the exchanger that the furnace's design allows us to access, alongside combustion behavior that reveals how the furnace is actually burning. If we see or measure something that raises a concern, you get documentation — photos, the method used, and the measurements — before any replacement conversation, and that documentation is yours to take for a second opinion. What we won't do is promise that any single visit can guarantee the absence of every defect; that's not honest, and we'd rather be useful than dramatic.
What filter should I use?
The one your system can breathe through — which is not automatically the highest MERV number on the shelf. Higher-MERV filters catch smaller particles but restrict more airflow, and a furnace starved of air trips limits, overheats, and burns more gas doing it. The right answer depends on your blower and duct static, and it's part of what the tune-up measures. We'll tell you the filter category your system runs best with — and the replacement schedule your household's dust actually demands.

Connect With Us For Your Free In-home Consultation!

Get the Furnace on Record Before Winter

The full sequence tested, the safeties proven, the findings in writing. Book online or call — fall slots go first.

Schedule Furnace MaintenanceCall (385) 865-6749