common hvac problems

Common HVAC Problems

January 15 2019

Common HVAC Problems – Checklists

Most Heating, Ventilating and Air Conditioning (HVAC) Systems are reliable performers, but they do have their limitations. It is best to have a basic understanding of common HVAC problems and solutions in order to keep your system running smoothly and effectively.

Some common HVAC problems are straightforward and relatively easy to address, others require a professional. At Hanover Supply Company in New Jersey, we’ve been supporting both homeowners and trade professionals for years for tools in NJ, and experience suggest that professionally cleaning and checking your HVAC system yearly especially in the fall before winter and in spring before the heat cranks up will keep problems to a minimum.


Checklist for Spring/Summer HVAC Preventative Maintenance

The items on this checklist should be done in order to prepare your air conditioning system for the summer season. It is usually best to have your system checked by a professional. Make sure that they:

  • Clean/replace filters
  • Clean the condenser and evaporator coils
  • Clean drain lines to ensure proper flow and clear clogs
  • Clear drain pans of standing water to avoid overflows
  • Replace worn pulleys and belts
  • Inspect the ducts for mold, dust, and debris
  • Observe humidity levels
  • Check refrigerant charge and check for leaks
  • Test thermostats and controls to ensure temperatures and timer functions are set correctly
  • Change batteries
  • Check the electrical system and connections
  • Check the fan motor
  • Check blowers and blades for correct airflow
  • Lubricate motor bearings and moving parts
  • Inspect the cabinet for leaks and check the cabinet door closes securely
  • Check for debris outside the unit


Checklist for Fall/Winter HVAC Preventative Maintenance

At Hanover Supply we recommend the following preventative maintenance tasks be performed to make sure that your heating system is ready for cold weather.

  • Replace filters on heating equipment
  • Inspect ignition burner assembly
  • Examine heat exchanger or heating elements
  • Study flue system and ensure secure attachment to the furnace
  • Inspect for gas leaks with gas furnaces
  • Assess gas pressure
  • Check pulleys and belts
  • Clear drain lines and pans
  • Check electrical connections
  • Lubricate motors, bearings and other moving parts
  • Check thermostats and controls
  • Check fan and blower operation and adjust as needed
  • Inspect heat pump
  • Examine ductwork and vents


Three Common HVAC Problems

  1. A common problem that can lead to a host of more serious problems is letting your HVAC system filters get dirty. Dirty filters make your HVAC system work harder and less efficiently and if left too long leads to mechanical and electrical parts failing. To avoid this, change your filters systematically. Change a standard 1” air filter every 1-2 months, and 4 to 5” filters at least twice a year, including during warm weather months.
  2. Thermostats control the whole system so it must be maintained in good working condition to keep your home at the desired temperature. Sometimes they malfunction for something as simple as needing a new battery, or a sensor issue. Sometimes they’ve been installed in a bad location. Sometimes they need to be replaced or relocated. Check circuit breaker and fuses as well as batteries before making a service call.
  3. Improperly sized equipment will wreak havoc on your system. If it is too small it will not be able to meet comfort needs during extreme weather conditions. If the system is too big your efficiency will drop which translates into higher costs. To avoid this happening make sure that you hire a contractor that performs detailed load calculations in order to correctly distribute treated air to each room.

At Hanover Supply we are ready and able to help you with all your HVAC needs. For more information, call us today.