J F Refrigeration Heating & Air Conditioning: Emergency HVAC Repair Serving Bismarck, ND 58501

In our cold Bismarck climate, a drafty or dirty thermocouple is a common culprit for pilot light failure. The thermocouple is a safety device that senses the pilot flame; if it's faulty, it shuts off the gas. Drafts from windows or vents can also blow it out. Our technicians can clean or replace the thermocouple, check for drafts affecting the furnace, and ensure your system is safe and ready for our harsh winters.

While some frost can be normal during operation, significant ice buildup on your outdoor unit is a sign of a problem common in our area. It's often caused by low refrigerant levels, restricted airflow from a dirty filter or blocked return vents, or a failing component. Turn the system off at the thermostat to let it thaw and call us. Running it while iced can damage the compressor. We'll diagnose the root cause—like a refrigerant leak or airflow issue—and fix it to restore efficiency.

We recommend bi-annual maintenance, ideally in the spring and fall, to prepare for extreme seasons. Our fall tune-up focuses on your heating system, checking the pilot assembly, thermocouple, heat exchanger, and airflow to prevent winter failures. Our spring service ensures your AC is clean, refrigerant levels are correct, and coils are clear to prevent ice buildup and handle summer heat. This proactive care improves efficiency, prevents costly breakdowns, and extends your system's life in our demanding climate.