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HVAC Tips & Guides
Every guide here is written by Andrey Yev, PE, General Manager of Alpha Mechanical and a California Professional Engineer (license #36700). They cover heating and cooling in Sacramento-area homes: what a symptom usually means, what repairs and replacements cost here, and which problems need a licensed technician. Alpha Mechanical has worked from Fair Oaks since 2011 under California contractor license CSL# 967727, with 4.9 stars across 270 Google reviews.
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Our most-linked guides, grouped by the problem in front of you.
AC running but not cooling
- Why Is My AC Not Cooling the House? A Sacramento Diagnostic Guide
Running all day without reaching the setpoint: how to tell normal summer runtime from lost capacity.
- Low AC Refrigerant: The Signs, and How a Technician Confirms It
The symptoms that point to a low charge, the faults that imitate it, and how a technician confirms it.
- Frozen AC Coil: Why Your Air Conditioner Freezes Up and How to Thaw It Safely
Ice on the indoor coil: the usual causes, and how to thaw it without damaging the coil.
Furnace problems
- Furnace Not Working? A Sacramento Furnace Troubleshooting Guide
The no-heat diagnostic we run on Sacramento service calls, symptom by symptom.
- Why Won’t My Furnace Turn On? 6 Fixable Causes
Common reasons a furnace will not start, and which ones you can check before calling.
- 5 Cracked Heat Exchanger Symptoms in Your Furnace
Warning signs, carbon monoxide precautions, and what to ask before agreeing to a replacement.
Costs and repair-or-replace
- AC Repair Cost in Sacramento: 2026 Price Guide
What common AC repairs cost in Sacramento this year, repair by repair.
- Repair or Replace Your HVAC? The Arithmetic
The repair-or-replace decision, worked through on our own Sacramento repair invoices.
- HVAC Replacement Cost in Sacramento: $9,500–$25,000 (2026)
Installed price ranges by system type, and how SMUD rebates change the total.
All guides
