Top-rated independent heating and cooling across California's Central Valley and the Sierra foothills
What to Check Before the Heat Goes On for the Season
Your heater sat untouched all summer while the AC ran hard. Now the mornings are cold, you push the thermostat up, and you get cold air, a burning smell, or nothing at all. That first startup is when problems show. A few checks now, before you need heat every morning, save you a cold house and a rushed call later.
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By our service team · vetted by the techs who do this daily
What the off-season does to a heating system
Across California and Nevada, a furnace or heat pump can sit idle for six or seven months while the cooling side works overtime. Dust settles on the burners and the heat exchanger. Attic and closet units collect the same fine ag dust and cottonwood fluff that clogs outdoor coils. Rodents chew wire insulation and build nests in ductwork. Flame sensors oxidize. Condensate lines dry out and crack. On heat pumps, the reversing valve has not moved since spring and sometimes sticks. None of that shows up until you ask for heat, which is why the first cold snap fills our schedule.
Which failures spike, and when
The first genuinely cold week of the season brings a wave of no-heat calls, and most fall into a few buckets. Dirty flame sensors and bad ignitors top the list, because a furnace tries to light, fails, and locks out. Next come blower motors and capacitors that were already weak from a long cooling season. In higher-desert areas we see more cracked heat exchangers and draft issues where systems run long hours. Mid-winter, thermostats and control boards act up. Late season, we find failed limit switches on units that ran restricted all winter behind a clogged filter.
Safe checks you can do yourself
Start with the filter. If you cannot remember changing it, change it now, and make sure it is seated with the airflow arrow pointing toward the unit. Check the thermostat: fresh batteries, set to Heat, fan on Auto, and the setpoint a few degrees above room temperature. Look at your panel for a tripped breaker. Walk the house and confirm supply and return vents are open and not blocked by furniture or rugs. If you have a heat pump, clear leaves, weeds and debris a couple of feet back from the outdoor unit. That is the whole safe list.
Stop and call if you notice any of these
If you smell gas, or a rotten-egg odor near the unit, leave the building first. Get everyone outside, then call 911 or your gas utility from outside, and call us after. Same for a carbon monoxide alarm: outside first, then the call. Do not go back in to check anything. Beyond that, call us before running the system if you see soot around the burner area, rusty streaks on the flue, water pooling at the base, a yellow or lazy flame instead of blue, or if the unit lights and shuts off repeatedly. Burners, gas valves, refrigerant and high-voltage parts are ours to handle.
What a pre-season visit actually covers
We pull the panels and look at the parts that fail. On a gas furnace that means inspecting the heat exchanger, cleaning burners and the flame sensor, checking the ignitor, testing safety limits and the draft, and confirming gas pressure. On a heat pump we test the reversing valve, defrost cycle, and auxiliary heat strips. Either way we check the blower wheel and motor, tighten electrical connections, read amp draw, verify the thermostat is calling correctly, and look at return air and duct condition. You get a straight rundown of what is worn and what can wait. Booking before the first cold week means you are not waiting in line.
What to Check Before the Heat Goes On for the Season — straight answers
Why does my heater smell like burning the first time I run it?
Usually dust burning off the heat exchanger and burners after months of no use. It should clear in fifteen or twenty minutes. If it smells sharp, electrical, or like gas, shut it off and call us.
When should I schedule a heating check?
Early fall, before the first real cold stretch. Systems that sat idle all summer show their problems on startup, and scheduling ahead of the rush means you are not without heat while you wait.
My furnace turns on then shuts off after a minute. What is that?
That pattern usually points to a dirty flame sensor, a restricted filter tripping a limit switch, or a draft problem. Change the filter first. If it keeps cycling, stop running it and call us.
How it works
- Step 1
Tell us the symptom
Call or fill in the quote form. We ask what changed, when it started, and what the thermostat reads. That tells us whether to bring parts for a cooling fault or a heating fault.
- Step 2
We diagnose on site
A technician checks the thermostat, the electrical side, airflow through the filter and coil, refrigerant pressures, and the outdoor unit. You get told what failed and why, in plain words, before anything is replaced.
- Step 3
Repair and verify
We make the repair, then run the system and measure the results at the vents. If a part needs ordering, we say so and give you a realistic window instead of a vague promise.
- A real person answers
- Open 7 days
- Written quote before work starts
Why homeowners call us
- Built for real valley heatWe work in areas where afternoons sit above 110 degrees and systems run for months without a break. That shapes how we size repairs, check capacitors and contactors, and judge whether a compressor is genuinely done.
- Attic and package unitsPlenty of homes across the region run attic air handlers or rooftop package units instead of a garage furnace and a side-yard condenser. We are used to the access, the duct runs, and the drain issues those setups bring.
- Dust and debris we expectAg dust, cottonwood fluff and grass clippings pack condenser coils and starve a system of airflow. We clean what we find and show you the difference, rather than adding refrigerant to a unit that just could not breathe.
- Heating too, not only ACFurnace repair, heat pump faults and no-heat calls get the same attention as summer work. Ignition problems, cracked or failing components and short cycling all get diagnosed before we recommend anything larger.
- All major brands, gas & electricFrom Carrier and Trane to Lennox, Goodman, Rheem and Bryant, serviced independently.
- Straight answersWhen a replacement beats a repair, we tell you, sometimes before we roll a truck.
About this guide
Checked everything on the list and it still acts up?
Report what you saw during the checks and we handle the rest. A minute to book.
- A real person answers
- Open 7 days
- Written quotes
- All major brands
- Gas & electric
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