It only happens occasionally. indoor blower goes off; outdoor unit continues to run and can only be turned off with circuit breaker. Only 2 or 3 things can cause this. The most common is a stuck compressor contactor. Located in the outside unit, the contacts get pitted and eventually weld shut. This can cause serious damage. Some authorities think it is good practice to replace the contactor every few years just like you would replace the spark plugs in an automobile. Other causes would be a shorted thermostat cable or a defective thermostat. Below is a list of possible causes and usually require a service technician to correct. The company You Choose To Install and Service Your System Will Determine The Degree of Comfort and Satisfaction You Enjoy. Excerpts of the preceding information have been compiled by Hannabery HVAC, which has graciously permitted us to include them on this web site as a service for all homeowners.While heat pumps are the most energy-efficient cooling system for our local climate, many homes in the Valley are equipped with

These units perform best when the outside humidity level isHere is some information to help you get the greatest comfort and efficiency from your evaporative cooler. An evaporative cooler is a box-shaped appliance with one or more porous surfaces that enable air toA fan inside the unit pulls outside air through the sides and into the house. cool air, each porous side is fitted with a pad of water-absorbing material. Water is stored in a pan at the bottom of the cooler and a small pump lifts the water to the top of each side. To effectively cool your home, each pad needs to remain damp, but not soaked. the most evaporation and, therefore, the most cooling. The amount of water the pump moves may need to be adjusted from time to time to properly dampen the pads. Climate control inside a home with an evaporative cooler depends on proper air balance. humidity, you need to make sure that the same volume of air flows out of your home as is pumped in.

You can attain balanced air flow by installing ducts in each room or opening windows when thecost to replace a central ac unit cooler is in use. types of residential ac unitsA window should be open just enough to allow air pressure inside a room to slowlywhat size wire for an ac unit and quietly close the door to that room. If the door closes forcefully, there is too little exhaust and the window should be opened wider. However, the window is open too far if the door doesn't move at all. To choose the right size evaporative cooler for your home, you need to determine how many cubic feet of air per minute (CFM) the unit can pump. If you can't locate the CFM number on your evaporative cooler or in the owner's

manual, the following formula will help you calculate it: Example: 1,625 sq. ft. x 8 ft. (ceiling height) = 6,500 CFM/2 Have your cooler serviced twice a year, prior to the cooling season and midwayRegular maintenance will help extend the life and efficiency of the equipment. Before starting up the unit, perform these simple maintenance steps: Evaporative cooler thermostats, available at many hardware stores, automatically turn off the cooler when the air reaches a desired temperature, making operation Most evaporative coolers without thermostats have separate switches for the fanIf your unit lacks a thermostat, allow your pump to run a few minutes before turning on the fan. This saturates the cooler pads. Evaporative coolers and central air conditioners both serve the same important purpose: keeping us cool. But these two systems operate very differently. Understanding the difference can help you get the most out of your system

and minimize wasted energy. Evaporative coolers cool air by filtering it through water, thus lowering itsEvaporative coolers produce humid air because the air absorbs water during the cooling process. These systems work best when a small amount of outside air circulates into the home while the cooler is on. Central air conditioners, on the other hand, work by taking humidity out of the home. These systems produce cold, dry air and work best in an airtight home. Regardless of what type of system you have, make sure it is operating properly. Systems that leak water, make unusual noise, or that don't produce cold air are probably not energy-efficient and can increase your energy bill. The major advantage of an evaporative cooler is that its operating costs are typically half those of a central air conditioner. Valley's monsoon season (between July and August) humidity often rises and, when combined with high temperatures, limits cooler effectiveness.

For that reason, few Valley homeowners rely exclusively on evaporative cooling. Lower original equipment cost than air conditioners Reduced control over temperature in house Air is not cleaned as well as with an air conditioner Need to open windows or vents to outside Damp air can cause doors and wood furniture drawers to swell Requires more maintenance than an air conditionerThey were expecting their air conditioners to cool them off. Instead, they started a fire.Although fire departments do not specifically track such incidents, Palm Beach County firefighters have already extinguished at least three such blazes in the last six months, said Cpt. Doug McGlynn of Palm Beach County Fire Rescue.The culprit in each case was a leaking air handler in a condo storage closet, which short-circuited electrical equipment underneath.With South Florida now at its hottest, the risk of such fires is at its peak, experts say. Since January 2011, 215 fires in Florida were related to air conditioners, the state Fire Marshal reported.

But it's a problem easily avoided by keeping drain lines unclogged and having units maintained."I would say most people do not properly maintain their AC drain line," McGlynn said. "It's 100 percent the homeowner's responsibility."The three condo fires McGlynn knew of — two at Kings Point, west of Delray Beach, and one at Palm Isles, west of Boynton Beach — were small and no one was injured. Smoke detectors alerted the residents early.In each case, the drain line became clogged and a drainage pan overflowed."With the summer, and people keeping their AC units running more often, it's very common that if you don't properly maintain your drain line" it can overflow, McGlynn said.Usually the result is a wet floor. But in many condos, to save space, the water heater is underneath the air conditioning unit. When water dripped, it shorted the heater and sparked, igniting insulation and items stored in the closet.The precautions homeowners can take are simple.When an air conditioner turns hot air cold, the moisture condenses and drains outside.

Pouring diluted bleach into the pipes can prevent algae from clogging them.McGlynn recommended having air conditioners checked out twice a year and keeping combustibles, such as broomsticks or paper products, out of the utility closet. He said residents should maintain working smoke detectors.Some units have floater switches that prevent drainage pans from overflowing by killing the power when the water level rises.Richard Gathright, who heads the Palm Beach County Building Division, said regulations prevent air conditioners from being installed in bathrooms, for example, but not above water heaters."These apartments are not very large, and with these closets, it's either going to be with the washer/dryer or the water heater," he said.Some complexes insist on replacing their air conditioning systems to avoid problems. Al Smith, property manager at Century Village in Deerfield Beach, said they've recently installed new units that are virtually incombustable, and Palm Isles West, outside Boynton Beach, has done the same."