Frequently Asked Questions About HVAC Units

Whether you’re a homeowner looking for maintenance advice or a business owner interested in energy-efficient solutions, learning more about your HVAC unit is important to ensure it runs efficiently. 

How Long Does an HVAC Unit Last?

The lifespan of an HVAC (Heating, Ventilation, and Air Conditioning) unit depends on many factors, including its type, usage, maintenance, and overall quality. On average, a well-maintained central air conditioner, heat pump, or furnace can last anywhere from 15 to 20 years.

Regular maintenance, such as cleaning or replacing air filters, checking refrigerant levels, and addressing any minor issues immediately, can significantly extend the life of an HVAC unit. Overworking the system can lead to premature wear and a shorter lifespan. 

Technological advancements such as smart thermostats and energy efficiency improvements may influence the decision to replace an older unit with a more modern and efficient one before its natural end of life. 

How do I Test an HVAC Low-Pressure Switch?

Testing an HVAC low-pressure switch is a crucial step in diagnosing potential issues with the system. 

  • To test the low-pressure switch, begin by turning off the HVAC unit and disconnecting the power supply. 
  • Locate the low-pressure switch, usually situated on the suction line of the compressor. Using a multimeter, set it to the continuity or resistance setting. 
  • Disconnect the wires connected to the switch and attach the multimeter probes to the switch terminals. 
  • With the system off, there should be continuity or low resistance across the switch terminals. 
  • Next, turn on the HVAC unit and monitor the multimeter readings. As the system operates, the pressure should rise, causing the switch to open, and the multimeter should indicate infinite resistance or an open circuit. 
  • If the switch fails to open when the pressure increases, it may be faulty and in need of replacement. 

Always refer to the manufacturer’s guidelines as you test your HVAC low-pressure switch. If you’re having trouble or want to ensure it’s done correctly, consider seeking professional assistance from the team at Martens Heating and Cooling.

Is a Boiler HVAC or Plumbing?

A boiler is typically considered part of the HVAC system rather than strictly falling under plumbing. 

While the plumbing system is responsible for transporting water throughout a building, including the delivery of hot water, a boiler specifically functions to heat water or produce steam for heating purposes. 

Boilers are important components of HVAC systems designed to regulate indoor temperature by distributing warm air or steam. The connection between plumbing and HVAC is showcased by the pipes that carry hot water or steam from the boiler to various heating elements, such as radiators or underfloor heating systems. 

Is HVAC and Furnace the Same Thing?

No, HVAC and a furnace are not the same things. 

HVAC refers to a comprehensive system that includes heating, ventilation, and air conditioning components, encompassing a range of technologies and devices designed to regulate indoor temperature, air quality, and humidity

On the other hand, a furnace is a specific heating device within the HVAC system responsible for generating heat. Furnaces can use various fuel sources, such as natural gas, electricity, or oil, to produce warm air that is then distributed throughout a building via ductwork. 

Do All HVAC Systems Have a Fresh Air Intake?

Not all HVAC systems have a dedicated fresh air intake since it depends on the specific design and purpose of the system. While some systems may incorporate a fresh air intake to introduce outside air into the space, others rely solely on recirculating and conditioning the indoor air. 

The inclusion of a fresh air intake is more common in commercial buildings and modern residential constructions that prioritize energy efficiency and indoor air quality. Systems with outside air intakes help ensure a continuous supply of fresh air and reduce the buildup of pollutants indoors.

How Can I Defrost My HVAC Unit in the Winter?

Defrosting an HVAC unit may be essential for maintaining optimal performance, particularly for heat pump systems, during the brutal Wisconsin winters. If you notice ice accumulation on the outdoor unit, turn off the system to prevent potential damage. Contact an HVAC contractor since attempting to chip away the ice can harm the components; if the unit is frozen, there is an issue with your system. 

Ensure that the system’s air filters are clean and replace them if necessary — clogged filters can contribute to freezing. Also, check for any obstructions around the unit, such as snowdrifts or debris, and clear them to facilitate proper airflow. 

Running the system in “defrost mode,” if available, can also help melt ice buildup. Locating the defrost mode on your HVAC unit can vary depending on the specific make and model of the system. Typically, defrost mode is a feature found in heat pump systems, as they are the most likely to experience ice buildup on the outdoor unit during colder temperatures. 

  • Check the User Manual. Start by consulting the user manual that came with your HVAC unit. Manufacturers provide specific instructions on operating modes and features, including defrost mode.
  • Thermostat Settings. In some cases, the defrost mode is controlled through the thermostat. Look for a specific setting or mode related to defrost. It might be labeled as “Defrost,” “Emergency Heat,” or have a snowflake icon.
  • Inspect the Outdoor Unit. Examine the outdoor unit for any labeled switches or buttons related to defrost mode. Some systems may have a physical switch on the unit itself.
  • Digital Controls. If your HVAC system has a digital control panel or interface, navigate through the settings to find the defrost option. This may involve scrolling through menu options or pressing specific buttons.

Remember that not all HVAC systems have a manual defrost mode, as many modern units are equipped with automatic defrost controls. In this case, the system will initiate defrost cycles as needed without manual intervention. 

If the problem continues or if you’re unsure about the appropriate steps, contact the professionals at Martens Heating and Cooling. One of our trusted HVAC technicians can assess and address the issue.

What is the HVAC Unit Outside Called?

The HVAC unit located outside is commonly referred to as the “condenser unit” or “condensing unit.” 

This essential component of the HVAC system is responsible for releasing heat absorbed from inside the building. In the case of an air conditioning system or a heat pump, the condenser unit contains the compressor and condenser coils. During the cooling process, warm air from inside the building is transferred to the outdoor condenser unit, where it releases heat, and the refrigerant cools down to be recirculated. 

The condenser unit typically sits adjacent to the building or on the roof, and it plays a crucial role in the heat exchange process that allows the HVAC system to effectively regulate indoor temperature.

Contact the Experts at Martens Heating and Cooling Today

If you have any further questions or concerns about the HVAC unit in your Fox Cities home, reach out to the experts at Martens Heating and Cooling. With extensive knowledge and experience in the heating, ventilation, and air conditioning industry, our team can provide valuable insights, guidance, and solutions tailored to your specific needs. 

Whether you’re seeking advice on system maintenance, troubleshooting issues, or are considering replacing your unit, our team is here to help. Our technicians travel throughout the Fox Cities area, including:

Call us today to ensure your HVAC unit continues to run smoothly throughout the new year.

Call Marten's Heating & Cooling at 920-685-0111

Martens Heating & Cooling