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 symptomsCheck 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 stepFind 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 onLook 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 stepWatch 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.

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.
Won’t turn on
Thermostat shows heat-on, the unit doesn’t respond. Usually ignition control, blower, or a tripped safety.
CO detector triggered
Carbon monoxide alarm? Stop using the system and call. This is a safety call, not a comfort call.
Runs but blows cold
Burner ignition issue, gas valve, or flame sensor. The system is trying — it just can’t finish the cycle.
Odd noises
Banging, rumbling, or whining usually points to a delayed ignition, a cracked heat exchanger, or a failing inducer.
House never warms up
Thermostat set high, system runs constantly, rooms stay cold. Often duct loss, blower speed, or undersized equipment.
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.
- Step 01
System inspection
Furnace, heat exchanger, blower, ignition, gas valve, thermostat, ducting — full top-to-bottom check.
- Step 02
Diagnosis & quote
We walk you through what we found and quote the repair. Flat-fee diagnostic — included if you proceed.
- Step 03
Repair on-site
Trucks stocked with common parts for every major brand. The price you approved is the final invoice.
- Step 04
Combustion check
We re-test ignition, gas pressure, and CO levels before leaving. Parts & labor warranted.
- 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.
258 reviews · Google
“My Nest is working perfectly thanks to their smart thermostat installation in Sacramento, CA.”
Larry H
Verified Google review
FAQ
Frequently Asked Questions
A licensed HVAC contractor who services your area and works on your system type. In Sacramento and Fair Oaks that is us — Alpha Mechanical books same-day diagnostic visits on no-heat calls, services every make and model, and charges a flat $89 diagnostic fee that is included in the repair if you go ahead. One thing comes before that call: if you smell gas or a carbon monoxide alarm is sounding, leave the house and call the gas utility or 911 first. If the furnace simply will not start, our won't-turn-on guide walks the checks in order.
Our heating service call is a flat $89 diagnostic fee — one price no matter how long the diagnosis takes, applied toward the repair if you proceed, and not charged at all if we cannot identify the problem. That covers the diagnosis only. The repair itself is quoted separately and upfront, so you approve the number before any work starts. For what individual heating repairs tend to run, our Sacramento repair cost guide has the full breakdown.
We specialize in all types of furnace repair in Sacramento, for both residential and commercial properties. Our expertise includes gas and electric furnaces — high-end and budget-friendly. No matter the make or model, our technicians have the knowledge and experience to diagnose and complete any furnace repair.
It depends on the issue and complexity of the repair. Minor repairs can be completed within a few hours, while more extensive repairs may take a day or longer. An Alpha Mechanical technician can provide an estimated timeframe after diagnosis.
Inadequate heating, strange noises, frequent cycling on and off, high energy bills, uneven heating, and poor air quality. If you notice any of these — especially in older systems — have your furnace inspected and repaired promptly to avoid further damage and ensure energy-efficient operation.
Yes. Sacramento cold snaps arrive fast, and we book same-day diagnostic visits on no-heat calls across Sacramento, Fair Oaks, and the surrounding areas — call early in the day for the best chance at a same-day slot. You can reach us any time to get on the schedule. To be straight about what that means: same-day visits are weekday service rather than an overnight dispatch, so if the heat quits at 2am the practical move is to stay warm safely and take the first slot in the morning.
It is the same quick repair-or-replace test we use on the AC side: multiply the system's age by the repair quote, and past $5,000 replacement usually wins. Our Sacramento repair cost guide runs the full math with worked examples. The furnace-specific override the formula misses: a cracked heat exchanger is a replacement call at almost any age, because it is a carbon monoxide safety issue, not an economics question.
Age, the specific failed part, and whether you are facing one repair or a pattern of them. Under 10 years old with a single failed component almost always favors repair. Past 15 years, with rising bills and a second or third failure, replacement usually wins — and in Sacramento a heat pump conversion can carry SMUD rebate money that a like-for-like gas furnace replacement does not, which changes the math. We quote the repair first and tell you plainly when replacement is the better spend.
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

