Johnson Heating & Air Conditioning: Certified HVAC Repair Serving Thief River Falls, MN 56701

This is a common issue here, often caused by a dirty thermocouple, a weak thermocouple signal, or a drafty area around your furnace. Our technicians will inspect and clean the thermocouple, check for proper gas pressure, and ensure the furnace area is sealed from drafts to provide a reliable, long-lasting fix.

Signs include reduced cooling, ice forming on the refrigerant lines or evaporator coil, and a hissing sound from the unit. A leak means your system is working harder, increasing energy bills. We'll perform a precise leak detection test and repair the leak before recharging your system with the correct amount of refrigerant for optimal performance.

Our preventative maintenance includes checking refrigerant levels and pressures to spot early signs of a leak, cleaning coils to maintain efficiency, inspecting electrical connections, and lubricating moving parts. This proactive service helps catch small issues before they lead to major breakdowns, especially important with our fluctuating local temperatures.