HVAC Troubleshooting
HVAC Troubleshooting for Maine Homeowners
Before calling a technician, there are a few things you can check yourself. This guide covers the most common HVAC problems Maine homeowners encounter and what to do about each. When in doubt — or when your system isn't working in extreme weather — call RG Mechanical for fast professional service.
What to Expect
Check thermostat: settings, battery, and mode (heat/cool/auto)
Check air filter — replace if dirty (every 1–3 months)
Check circuit breakers for your HVAC system
Check outdoor unit for ice, debris, or blocked airflow
For oil systems: check oil tank level and try one reset button press
For gas systems: confirm pilot light is lit on older units
Frequently Asked Questions
What should I check before calling an HVAC technician?
Thermostat settings and battery, air filter condition, circuit breakers, and outdoor unit clearance. These simple checks resolve a surprising number of apparent HVAC problems.
When should I definitely call a professional?
For any no-heat situation in winter, suspected gas leaks (evacuate immediately and call 911 first), refrigerant leaks, electrical issues, or anything that doesn't resolve after basic checks.
Can I reset my HVAC system myself?
You can reset a furnace by pressing the reset button once, or reset an AC by turning it off for 30 minutes. However, if the system trips the same reset again, there's an underlying issue that needs professional diagnosis.
Why does my HVAC run constantly without reaching the set temperature?
Usually undersized equipment for the load, a refrigerant or heat loss issue, poor insulation, or extreme weather outside the system's rated range. Call us for diagnosis.
Ready to get started?
Call us or request a project estimate. Contact RG Mechanical to confirm service availability for your community.
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