At Mills Northwest Heating & Cooling Inc, we recommend performing routine maintenance on your HVAC system annually. This will help it stay in good working condition. 

We do! Specifically, we follow the manufacturer warranties that come with the parts installed during service calls. 

You can count on Mills Northwest Heating & Cooling Inc for heating and cooling maintenance, repair, and installation service. We also work on heat pumps, furnaces, and ductless heating systems. We serve customers in Chehalis, WA and the surrounding areas. 

HVAC filters should be changed every 2-3 months. If you need assistance with this, please give Mills Northwest Heating & Cooling Inc a call. 

Your HVAC unit is likely running in defrost mode, which is designed to keep it from icing up during the colder months. If you have further questions, please don't hesitate to reach out to Mills Northwest Heating & Cooling Inc today.