Northstar Heating & Cooling Services | Best HVAC Repair in Duluth, MN

First, check your thermostat settings and ensure the furnace power switch is on. If it's still not working, it's likely an issue with the ignition system, flame sensor, or gas valve—common problems in extreme cold. For your safety and to prevent further damage, it's best to call a professional. Northstar's technicians are experienced with Duluth's harsh winters and can diagnose and repair ignition failures promptly to get your heat restored.

Duluth's summer humidity and pollen can cause dirt and debris to build up on your outdoor condenser coils quickly. Dirty coils force your AC system to work much harder, reducing cooling efficiency, increasing your energy bills, and leading to premature component failure. Regular professional coil cleaning is a key part of maintenance that ensures your system runs reliably and efficiently throughout our seasonal shifts.

We recommend bi-annual maintenance: a furnace tune-up in the fall to ensure safe, efficient operation before winter, and an AC check in the spring to clean coils, check refrigerant levels, and verify all components are ready for summer. This proactive approach is the best way to prevent common local issues like ignition failures in winter and inefficient cooling in summer, saving you money on repairs and energy costs.