Air temperature and humidity are controlled by an HVAC operation.
The three meaningful functions of a familiar heating and cooling operation are heat, ventilation and air conditioning (HVAC). Air temperature and humidity are controlled by an HVAC system. Elements of an HVAC system can include heat pumps, air conditioners, gas and oil furnaces, fan coils, evaporator coils, and controls and thermostats. Most central heating and cooling systems are forced air systems and use ductwork to send air throughout the home. The ductwork can include filters.
Instructions
1. Inspect the air conditioning. Check to make sure the thermostat is in the "cool" position. Make sure the outside unit is running and not blocked by debris like leaves. The fan should move freely and not be blocked by fallen foliage or limbs. Make sure the power supply is on. Check the inside unit---the furnace. Verify that the drapes are not covering any vents. There should be a minimum of Four inches of free space around each vent.3.
Make sure the registers (vents) are open. Check that furniture isn't blocking them. Make sure the return air grille is open and unblocked. The blower should be running any time the air conditioning is running. Check the power supply if it isn't.2. Troubleshoot the air flow and ductwork.
Inspect the gas furnace. Make sure the thermostat is in the "heat" position. Verify that the gas bill has been paid or make sure fuel is available. If the furnace uses propane or oil, check the tank.
4. Replace the filter in the furnace. Some filters should be replaced monthly. The filter in the indoor furnace is typically located in a slot just above the floor. There may be a tab to pull, or you might need to undo a couple of screws. Check the owner's guide to your specific furnace for the filter location and the specifications for the replacement filter.
5. Verify that the thermostat is set to the desired temperature. Some thermostats are programmed with a dead zone, which can be up to six degrees, so you may have to temporarily increase or reduce the set temperature, as appropriate, to get the heating and cooling system to kick in.
