Alpha Mechanical - Cooling & Heating

Heating & Furnace Repair · Sacramento

Heating & Furnace Repair in Sacramento — Heat back on.
No upsell.

Same-day heating and furnace repair across Sacramento. Flat-fee diagnostic, upfront pricing, every make and model.

  • Same-Day Service
  • Flat-Fee Diagnostic
  • NATE Certified
  • Parts & Labor Warranty

01No heat right now

No heat in Sacramento — what to check before you call — Furnace died? Check these first.

Most of this costs nothing and takes about ten minutes. Work the steps in order — the first one is a safety gate, not a troubleshooting step. If you reach the end and the house is still cold, that is a real service call, and we book same-day diagnostic visits on weekdays across Sacramento and Fair Oaks.

  • First: stop if you smell gas or the CO alarm is sounding

    Gas, a persistent burning smell, or a carbon monoxide alarm means do not relight it and do not keep running it. Shut the system off and get everyone outside — call the gas utility or 911 first if the smell is strong, then call us.

    Cracked heat exchanger symptoms
  • Check the thermostat before anything else

    Set to HEAT, setpoint above room temperature, fan on AUTO. If the screen is blank you have a power problem rather than a furnace problem — and several newer models carry no user-replaceable batteries at all.

    Blank thermostat, step by step
  • Find the furnace switch, then the breaker

    Most furnaces have a switch beside or above them that looks exactly like an ordinary light switch, and it gets flipped off by accident more often than you would expect. Check that first, then the breaker panel.

    Furnace won’t turn on
  • Look at the filter

    A filter left in since spring chokes airflow, overheats the furnace, and trips a safety limit — the system then short-cycles or quits outright. This is the cheapest thing on the list to rule out.

    Furnace cleaning, step by step
  • Watch what it does when it tries to start

    If it fires, runs a few seconds, then shuts down, that usually points at the ignitor or flame sensor rather than anything structural. Most furnaces built in the last twenty years have no standing pilot to relight.

    Pilot light and ignition, safely

Still no heat? That is the point to stop troubleshooting and book the visit. The diagnosis is a flat $89 fee no matter how long it takes to find the fault, and it is included in the repair if you go ahead. If the heat is out overnight, our heating-system walkthrough covers staying warm safely until a technician gets there.

Alpha Mechanical technician testing furnace electrical components with a multimeter
On-site · Sacramento County

Flat-fee diagnostic. Included in the repair if you proceed.

02Heating & furnace repair

Expert heating & furnace repair in Sacramento — Cold house.
Hot answer.

When a Sacramento cold snap drops the house into the 50s indoors, you don’t want a two-week wait or a hard sell. We diagnose, quote, and fix on the spot — most repairs finish in a single visit.

We regularly repair systems other companies tried to sell. If a fix is the right call, that’s what we recommend.

03When to call

Common heating problems and warning signs — Don’t wait — these mean call now.

Heating problems get worse fast, and a few of them are actual safety issues. If your system does any of this, pick up the phone.

01

Won’t turn on

Thermostat shows heat-on, the unit doesn’t respond. Usually ignition control, blower, or a tripped safety.

02

CO detector triggered

Carbon monoxide alarm? Stop using the system and call. This is a safety call, not a comfort call.

03

Runs but blows cold

Burner ignition issue, gas valve, or flame sensor. The system is trying — it just can’t finish the cycle.

04

Odd noises

Banging, rumbling, or whining usually points to a delayed ignition, a cracked heat exchanger, or a failing inducer.

05

House never warms up

Thermostat set high, system runs constantly, rooms stay cold. Often duct loss, blower speed, or undersized equipment.

06

Gas or burning smell

Faint dust on first burn is normal. Gas, sulfur, or persistent burning is not — call before running again.

04The process

Our heating repair process — Five steps.
No shortcuts.

Same diagnostic, same upfront price, same warranty on the way out the door — every call, every customer.

  1. Step 01

    System inspection

    Furnace, heat exchanger, blower, ignition, gas valve, thermostat, ducting — full top-to-bottom check.

  2. Step 02

    Diagnosis & quote

    We walk you through what we found and quote the repair. Flat-fee diagnostic — included if you proceed.

  3. Step 03

    Repair on-site

    Trucks stocked with common parts for every major brand. The price you approved is the final invoice.

  4. Step 04

    Combustion check

    We re-test ignition, gas pressure, and CO levels before leaving. Parts & labor warranted.

  5. Step 05

    Maintenance tips

    Filter cadence, filter spec, what to listen for. No pressure to buy a plan you don’t need.

05Systems we repair

Heating systems we repair — Whatever heats the house —
we work on it.

  • System

    Gas furnaces

    High-efficiency and standard, every major brand.

  • System

    Electric furnaces

    Element, sequencer, and blower-side issues.

  • System

    Dual-fuel systems

    Gas-furnace and heat-pump hybrids, switchover control.

  • System

    Heat pumps

    Heating-mode failures, defrost issues, dual-fuel.

  • System

    Mini-splits

    Single-zone or multi-zone, indoor or outdoor.

  • System

    Smart thermostats

    Nest Pro Installer — wiring and config.

06What usually fails

Furnace repair in Sacramento — what usually fails first — Most furnace calls come down
to one of six parts.

Knowing which one is acting up tells you whether this is a same-day fix or a bigger conversation. Sacramento furnaces tend to fail in the first genuinely cold week of October, when a system that sat idle all summer gets asked for heat and a marginal part finally gives up — which is also the week every heating company here is busiest.

  • 01

    Ignitor or flame sensor

    The furnace tries to start, runs a few seconds, then shuts down. Common, inexpensive, and usually same-day.

  • 02

    Clogged filter or blocked return

    The furnace overheats and trips a safety limit. Often the cheapest fix on the list — and the easiest to prevent.

    Furnace cleaning, step by step
  • 03

    Pressure switch

    The furnace never reaches ignition, or cuts out partway through the cycle.

    Pressure switch troubleshooting
  • 04

    Inducer motor

    You hear it straining, grinding, or whining before the furnace quits.

    Signs of a bad inducer motor
  • 05

    Gas valve

    No heat at all. This one is licensed-technician territory — not a DIY check.

    Gas valve troubleshooting
  • 06

    Cracked heat exchanger

    The failure that ends in replacement rather than repair, because it is a carbon monoxide risk.

    Cracked heat exchanger symptoms

If the furnace simply will not start, our won’t-turn-on guide walks the checks in order, and the full furnace troubleshooting guide covers the rest. A heating tune-up in late summer catches most of these while they are still cheap to replace. If the system is old enough that repair stops making sense, furnace replacement covers that decision — and a heat pump conversion may carry SMUD rebate money that a like-for-like furnace swap does not.

07Why Alpha Mechanical

Why choose Alpha for heating repair in Sacramento — The repair company
that won’t sell
you a new system.

We regularly fix problems other companies couldn’t diagnose, or where a homeowner was pushed toward furnace replacement they didn’t actually need. If repair is the right call, that’s what we’ll tell you. Also serving commercial buildings — see commercial HVAC.

Related: furnace cleaning & maintenance · heat pump repair · financing

  • 0115+ years repairing Sacramento furnaces and heaters
  • 02Flat-fee diagnostic — included in the repair if you proceed
  • 03Service every make and model, residential or commercial
  • 04Comprehensive parts & labor warranty on every repair
  • 0518% off repairs
  • 064.9 stars across 258 Google reviews

Verified reviews

What Our Customers Say

Real reviews from customers across Sacramento and the surrounding areas.

4.9/ 5

258 reviews · Google

  • My Nest is working perfectly thanks to their smart thermostat installation in Sacramento, CA.

FAQ

Frequently Asked Questions

Sacramento · Fair Oaks · Folsom · El Dorado Hills

Schedule heating repair in Sacramento today — Cold house?
Get the heat back on.

$89 flat diagnostic, included in the repair if you proceed. Parts and labor warranted. Members save on every repair.

Also serving Fair Oaks · Roseville · Arden-Arcade · Gold River · Folsom · El Dorado Hills · Carmichael · Orangevale · Citrus Heights · Gold River · Rancho Cordova · all areas

916-848-5980