The transition from winter to spring means it’s time for spring cleaning and maintenance. This year, you can smoothly switch your system’s gear by scheduling a preventive maintenance check with your HVAC technician.
Check Air Filter and Thermostat
Don’t be surprised if one of the first things your HVAC technician does is check your air filter. A clogged air filter can increase cooling costs by up to 15 percent and damage the air handler motor that pulls air through the ducts.
Your thermostat will be tested through all modes. If you have an old mercury-based thermostat, don’t be surprised if you hear about the benefits of upgrading to a programmable thermostat. Programmable models encourage consistent temperatures and energy-saving set-back/up periods.
Clean Coils and Drainage
Free airflow and heat exchange are the foundation of A/C and heat pump cooling. Very cold refrigerant is pumped through the indoor evaporator coil, causing condensation, which can promote mold and bacteria growth. The coil, fins, drip pan and drain line must all be thoroughly deep cleaned and chemically treated.
The cabinet located outside your home contains the compressor and condenser coil. If you’re turning on your A/C or heat pump for the first time this season, turn on the circuit breaker and leave the system without turning it on for 24 hours to let the oil and refrigerant separate in the compressor.
Inspect the Ductwork
Turn on the A/C or heat pump and listen for unusual noises, such as rattling, clamoring, grinding and chirping. Rattling and clamoring indicate loose ducts knocking at a connection, which can be sealed with mastic paste and metal-backed tape. Grinding noises indicate a problem with the air handler motor, while chirping may be caused by a loose or frayed belt. If this occurs, turn off your system and let your HVAC technician take care of the problem.
For more tips on preparing your HVAC system, or to schedule service for your Twin Cities metro home, contact Marsh Heating & Air Conditioning.
Our goal is to help educate our customers in Minneapolis-St. Paul, Minnesota about energy and home comfort issues (specific to HVAC systems). For more information about HVAC systems and other HVAC topics, download our free Home Comfort Resource guide.
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