Question 1

How often should I replace my filter?

Accepted Answer

Basic fiberglass: monthly. Pleated filters: every 90 days. HEPA filters: per manufacturer (usually 6-12 months). Check monthly regardless.

Question 2

Why is my electric bill so high?

Accepted Answer

Dirty filters, refrigerant leaks, or a system working harder to maintain temperature. Also check for duct leaks—you could be cooling your attic.

Question 3

Is a maintenance contract worth it?

Accepted Answer

Depends on the price and what's included. Priority scheduling in peak season and caught-early repairs often justify $150-200/year for older systems.

Question 4

When should I replace my HVAC system?

Accepted Answer

10-15 years old, frequent repairs, R-22 refrigerant (phased out), or significant efficiency drop. New systems are much more efficient.

Complete HVAC Repair Guide: Heating, Cooling, and Airflow Problems

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