Unfortunately, A/C breakdowns happen most in summer. Home warranty insurance policies don't perform well in summer. Home warranty companies don't have A/C technicians on an hourly payroll. They have to subcontract the work to A/C companies. Some A/C companies do very well just specializing on home warranty a/c claims, but most A/C companies stay away from them. Home warranty A/C calls do not work for every A/C company. Home warranty calls don't pay much money. It works well for companies that have lots of entry level technicians, that are looking for experience that don't make much money. A technicians experience place a big part in the outcome of the repair. Since entry level techs have seen fewer situations they are going to give customers fewer options to correct the problem. The more options you give a customer, the happier the customer will be.

A/C companies don't make much on home warranty repair calls. So many A/C companies will try to replace your system. Some companies will try to sabotage your unit for a quick sale. Once your equipment gets sabotaged, there is no guarantee that the home warranty will replace your unit. If your A/C breaks down in the middle of summer, sometimes it can take a few days for service. Another problem with home warranty is that they usually don't provide 24 hour emergency & weekend service. Many customers don't worry about that bad situation until that they really happens, but it happens more often than you think. The bad situation starts when its close to 100 degrees and they don't show up. That is a common problem. Then when they make it finally make it, they might have order parts. As long as you don't set your expectations to high you should be good.

If your variable speed motor or control board break down, right before the weekend starts, you might be without cooling for a few days. Don't get confused between capacity and efficiency, they both with get your home cool. The more efficient furnace saves you a lot more money on your utility and gas bills. If you are looking for premium indoor air quality, a high-efficiency furnace is a way to go. High-efficiency furnaces are much better at removing humidity from your home. Lowering the humidity in your home also makes your home smell better. Lower humidity levels reduce allergens such as dust mites, mold, and mildew. Lower humidity levels in your home keep the food fresher. Computer equipment, electronics, & TV's function is much better at low humidity levels. High humidity levels can also cause sleeping problems. There is lots of technology that goes into a variable speed fan motor. Variable motors operate from both high and low voltage 120 Volt alternating current. There is also the main control board in the furnace that controls the variable speed blower motor.

An air conditioner with a malfunctioning metering device starves freon from entering the evaporator coil. A metering device is also called a thermal expansion valve. A thermal expansion valve regulates the amount of freon entering the evaporator coil. There is a spring, in the valve body that opens and closes the TXV with temperature sensing bulbs in the suction line. Many inexperienced technicians misdiagnose a thermal expansion valve problem with an undercharged unit. Too much airflow through the evaporator coil is also a cause for low delta t. If the blower motor speed is set too high, on some high-efficiency furnaces, sometimes the vibration from the furnace causes the front panel to fall off. The furnace then absorbs all the hot air from the attic. Abnormally high humidity in the home also causes a low delta t. A liquid line restriction in your filter drier also causes your system to pump down and starve the evaporator. A malfunctioning compressor can cause a wide range of delta t temps. A compressor with bad internal valves also called an inefficient compressor has a low delta t. The compressor sounds like its working, but it isn't. If you have a heat pump, leaking reverse valves causes hot gas to go in your suction line, causing a warmer evaporator temperature. A leaking supply & return duct in your attic also causes hot attic air to get duct system. Animals in the attic can also damage your ducts. Airflow problems cause a high delta t. A dirty filter causes poor airflow, causing your evaporator coil to freeze up. A blower motor not working correctly immediately causes your unit to freeze up and reduces your delta t.