Common heating systems:

  1. Forced air gas furnaces (ducts, grills and registers)
  2. Steam boilers
  3. Hot water gas boilers:
  • Water pipes, radiators, convectors, baseboards
  • Radiant heating (water pipies located in the floors)


     3.  Electric:

  • Electric forced air furnaces
  • Space heaters
  • Radiant heating (heating elements located in the flloors or ceilings)                               




A warm air system uses a furnace to deliver the heat throughout the home. The air is heated in the furnace and a blower forces it into a duct system. The warm air is then released into your home, through vents or registers in your walls, ceilings or floors.


Heat exchanger cracks, holes, rust or soot

  • Cracks, holes or rust may develop because of:

          1.  Condensation, leaky humidifiers, leaky A/C tray

          2.  Metal fatigue from repeated heating and cooling

          3.  Manufacturing defects (faulty welds, stressed, thin or low quality steel).

Clogged or dirty furnace filters

Dirty filters are one of the most common furnace problems—blocking heat flow, polluting indoor air and also causing furnace parts to run harder and burnout sooner. Check or change furnace filters monthly or semi monthly, depending on the age of your furnace, how often you run it and the level of impurities being circulated, like pet dander. If the size of your furnace allows, get a reusable, washable filter to save money and simplify maintenance. Be sure the furnace door is closed after changing filters or the furnace will not run.

Gas Furnace Produces No Heat

Possible causes

  • Thermostat set too low and not calling for heat
  • Thermostat not working
  • Circuit breaker or fuse controlling the furnace is tripped or blown
  • Natural gas or propane control valve is closed
  • Pilot light is out (non-electronic ignition)
  • Hot Surface Ignition electronic ignition problem
  • Intermittent Pilot electronic ignition problem

Gas Furnace Does Not Produce Enough Heat

Possible causes

  • Dirty furnace air filter
  • Gas burners may be dirty or need adjustment
  • Obstructed air flow to combustion air chamber

Gas Furnace Comes On and Off Too Frequently

Possible causes

  • Dirty furnace air filter
  • Blower motor problem
  • Thermostat problem (heat anticipator)

No air or weak airflow

Possible causes

  • Disconnected ducts
  • Dirty, obstructed or collapsed ducts
  • Leaky joints
  • Excessively long duct runs
  • Undersized ducts.
  • Excessive elbows in the ducts

Hot water heating system


A hydronic system uses water or steam to heat your home. In a hot water system, the boiler heats the water to approximately 180 degrees. A circulator moves the water through the pipes that lead to baseboard heaters, radiators or radiant tubing.

In a steam system, the boiler turns the water into steam, which then rises through the pipes to radiators.

Hot water heating systems advantages

  • Provide even heat
  • Do not create draft
  • Are usually quieter than forced air systems
  • Do not circulate odors
  • Using small diameter pipes
  • More energy efficient to transport hot water than hot air
  • Easier to control and zone water



  • It's more costly to install and service when compared to forced air furnaces.
  • No water inside to freeze if the powern fails