🔧 HVAC Troubleshooting & Maintenance Encyclopedia

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SEER2 Rating: New Efficiency Standards 2023+ SEER2 replaces SEER—15.0 minimum in South, 14.3 in North. How the new testing procedure produces lower (but more realistic) efficiency numbers.

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HVAC Rebates & Tax Credits: IRA Guide Inflation Reduction Act: up to $2,000 tax credit for heat pumps, up to $8,000 in rebates for low-income households. HEEHRA rebates and how to qualify.

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AC Sizing: Manual J Load Calculation Why 'tons per square foot' rules of thumb almost always oversize equipment. Manual J accounts for windows, insulation, orientation, and occupancy—proper sizing prevents short cycling.

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HVAC Replace vs Repair: The $5,000 Rule Multiply repair cost by equipment age. If over $5,000, replace. Also: R-22 systems must be replaced (refrigerant phased out), and 10+ year old systems with major failures.

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Carbon Monoxide & HVAC Safety CO detector placement (every level, near bedrooms), cracked heat exchanger detection, and why you must evacuate immediately if the alarm sounds—don't investigate first.

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Gas Smell Near Furnace: Immediate Actions Rotten egg odor = mercaptan in natural gas. Evacuate immediately, don't touch electrical switches, call gas company from outside. The difference between a small leak and an explosion risk.

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HVAC Fire Hazards: Prevention Guide Dust accumulation on heat strips, clogged filters causing overheating, and electrical faults in aging equipment. Annual inspection identifies fire risks before they become fires.

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Emergency HVAC Repair: 24/7 Service Guide What counts as an emergency (no heat below 50°F, no AC above 95°F for vulnerable occupants, gas leak, electrical burning smell) vs next-day service situations.

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Spring AC Tune-Up Checklist Coil cleaning, refrigerant charge check, capacitor testing, condensate drain flush, and blower motor amp draw—the professional maintenance that prevents 80% of summer breakdowns.

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Fall Furnace Tune-Up: Winter Preparation Heat exchanger inspection, burner cleaning, gas pressure check, flame sensor cleaning, and CO testing. Do this in September before HVAC companies are booked solid.

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HVAC Maintenance Plans: Worth the Cost? Typical $150-$250/year for two visits—the 15-20% discount on repairs, priority scheduling during heat waves, and extended equipment life that usually makes plans pay for themselves.

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Clogged Condensate Drain: AC Water Leak Fix The most common AC failure that's NOT an AC problem. Algae and mold in the PVC drain line—vinegar flush prevention and float switch installation to prevent ceiling damage.

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Commercial Rooftop Unit (RTU) Maintenance Packaged rooftop units serving commercial spaces—economizer operation, belt tension, and filter bank management. Preventive maintenance contract essentials for facility managers.

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Restaurant Kitchen HVAC: Grease & Heat Load Makeup air units, Type I vs Type II hoods, and why restaurant HVAC fails 3x faster than standard commercial. Specialized maintenance requirements.

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Server Room & Data Closet Cooling Solutions Split systems vs portable spot coolers for IT spaces. The cost of inadequate cooling—thermal throttling and hardware failure vs proper dedicated cooling design.

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AC Replacement Cost: Complete Pricing Guide Central AC replacement: $4,000-$8,000 for 3-ton system. Factors: SEER2 rating, single vs two-stage vs variable speed, existing ductwork condition, and regional labor rates.

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Emergency No-Heat Furnace Repair Service No heat in freezing weather is an emergency—frozen pipes can cause $10,000+ in water damage. Emergency service costs, diagnosis protocol, and temporary heating alternatives.

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HVAC Financing & Payment Plans 0% APR for 60 months, lease-to-own, and PACE program financing for HVAC replacement. Deferred interest traps to avoid and why contractor financing through manufacturers beats credit cards.

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Home Energy Audit: Finding HVAC Inefficiency Blower door test, thermal imaging, and duct blaster testing—an energy audit identifies the envelope and ductwork problems that make your HVAC work harder than necessary.

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R-22 Freon Phaseout: What It Means for Your AC R-22 refrigerant banned from production/import since 2020. If your pre-2010 AC needs refrigerant, you're paying $200+/lb for recycled stock. Time to replace with R-410A or R-32 system.

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Commercial HVAC Service Contract Comparison Full-coverage vs preventive-only commercial contracts. Labor inclusion, emergency response time guarantees, and parts markup transparency. What facility managers should negotiate.