When should I replace my filter?
Filter intervals vary by filter type, home conditions, occupancy and equipment. Inspect filters regularly and replace them when visibly loaded rather than relying on one universal schedule.
When should HVAC be serviced?
Routine inspection before heavy heating or cooling seasons can identify maintenance needs before peak demand.
What is temperature split?
Temperature split is the difference between return-air and supply-air temperature. It is one diagnostic clue—not a complete diagnosis by itself.
Why won't my home reach 70°?
During extreme outdoor heat, system capacity, insulation, solar gain, air leakage and equipment condition all affect indoor temperature. A setpoint alone does not guarantee the building can maintain it.
What's normal—and what isn't?
Long run times can be normal during extreme weather. Unusual noises, burning odors, repeated cycling, ice buildup or sudden performance changes deserve attention.
Repair or replace?
Age, condition, repair history, efficiency, comfort and repair cost should be considered together. APEX can evaluate the equipment before a replacement decision is made.
Educational copy will be technically reviewed with APEX before production launch.