You may have a tripped circuit breaker. Recommended Action: Check your home circuit breaker box and reset Your thermostat/control may be off or set incorrectly. Recommended Action: Check to make sure your thermostat/control is on and set to cool. Reset to your desired temperature. Your indoor unit is running but the outdoor unit is not. Recommended Action: Air coming through your vent will be warm. temperature setting on thermostat/control. If no change, contact yourIn the meantime, try turning off your thermostat/control for 1 to 3 hours to see if it will reset itself. Your gas could be turned off. Recommended Action: Check gas valve at gas company meter, check shutoff valve at furnace and check for other shutoff valves. the gas company to have gas valve turned on or contact your local Trane Your system could be turned off or your unit unplugged. Recommended Action: Check your thermostat and heating unit to assure

that they are both plugged in. Refer to your use and care guide or contact your local Trane Your thermostat may be off or set incorrectly. Recommended Action: Make sure your thermostat is on and set to heat. If thermostat is on, reset thermostat to your desired temperature. You may have a tripped circuit breaker. You may have dirty filters. Recommended Action: Check the filters in each of your system’sClean or replace filters as recommended in your use andIf problem persists, please contact your local Trane Your system may have frozen up due to a dirty coil. Recommended Action: Check for signs of water below unit and cold exterior surface of indoor coil enclosure. Contact your local TraneIn the meantime, try turning your thermostat off for 1 to 3 hours to see if it will defrost. If your system is reaching its set point, is it working correctly? Have your local temperatures been extreme lately? Recommended Action: Check the following: Is your system cycling

Is your thermostat reaching its set value? Do you have any new appliances (e.g., a hot tub or pool heater) that use lots ofHave you checked to see if your local utility company had aIf your system is not reaching its set point, please contact your local Trane Comfort Specialist. Your system could be trying to reach a set point that is too extreme. Recommended Action: Check the set point on your thermostat. very low (in summer months) or very high (in winter months)? If that doesn’t work, please contact your The overflow switch is probably not working Recommended Action: Turn off your system and contact your local Check any of the above troubleshooting issues for help. Recommended Action: If none of the troubleshooting answers address your problem, then turn off your system and contact your local Trane These are probably the most common Summer-Time HVAC-related complaints! But first things first, please check all of the obvious things (listed below), before scheduling a service-call.

Is the thermostat set to "cool" and turned down below room temperature? Is the Power on to the indoor unit? Did you check the breaker? Is the Power on to the outdoor unit? If yes to these, is the outdoor unit running? If no, see if the outdoor unit has a red reset button (most Rheem equipment does, located near refrigerant lines), and push it.ac units free standing If that didn't work, see if you have a condensate pump at the indoor unit. portable ac unit how it worksIf you do, some pumps have a safety switch that shuts off the outdoor unit if the pump overfills and fails to pump. central air conditioning units problemsSo check the pump to see if it is working. If that wasn't the problem, back outside at the unit there should be a disconnect box mounted on the wall.

These come in many styles. Some have an on-off switch, some have a pull-out plug. Some have a circuit breaker and some even have fuses. If it has a breaker, make sure it didn't trip. If it has fuses, they should be checked. Caution: High Voltage, danger of electrocution. Please do not attempt this unless you are familiar with working with electricity. For more possible causes as to why your outdoor unit isn't running, please see: If you have checked all of these things, and your unit still isn't running, then you should schedule a service-call. If your outdoor and indoor units are BOTH RUNNING, BUT NOT COOLING, make sure that all windows and doors are closed, your supply and return vents are open - not blocked, and that your air filter is clean. If no problems there, then you should probably turn the air conditioning off and schedule a service-call. Refrigerant flow-related problem - restriction Poor efficiency- needs cleaning and servicing Duct leak in unconditioned space

Outdoor coils damaged or very dirtyWindow air conditioners or central air aren't the only ways to cool down a hot house. Check out these alternative solutions from the team at The Family Handyman. Whole-House FansWhole-house fans may seem old fashioned, but they're enjoying renewed popularity. The idea behind them is simple: A powerful fan draws cooler early morning and evening air through open doors and windows and forces it up through the attic and out the roof vents. This sends hot air up and out, cooling your house and your attic. These fans are commonly mounted in an upstairs stairwell or hallway ceiling where there's at least 3 ft. of clearance above the fan.They use 90 percent less energy than an air conditioner, and in dry climates with cool mornings and evenings, they can actually replace your AC system.With a helper and basic tools, you can install a whole-house fan in a weekend.Main DisadvantagesThey can't cool inside temps any lower than outside temps and they can't dehumidify.

They can make allergies worse. Whole-house fans draw in outdoor pollen and dust.Larger fans move air quickly, but they cost more to purchase and install. They also require significant attic ventilation and make more noise than smaller attic fans.For the best results, match the fan size to your floor plan, cooling needs and available attic ventilation. Call your local utility and check energystar.gov to see which models qualify for local rebates and the federal tax credit in 2010. Fans cost $200 to $1,200.Portable Air ConditionersPortable air conditioners are similar to window units in operation. They sit on the floor (on casters) and use an adapter kit to vent the hot air through a hose running through a window, a wall, or a sliding glass door.Main AdvantagesThey're easy to install and use.You can move them from room to room.Main DisadvantagesThey're almost twice as expensive and use more energy than a similar-size window unit with the same cooling capacity.At this time there are no Energy Star–qualified portable room air conditioners.

Portables range in price from $300 to $1,500 depending on the size, features, and efficiency.Mini-Split SystemLong popular in Europe and Japan, a mini-split system air conditioner (sometimes called ductless AC), is a hybrid of central air and a window unit. A small condenser sits outside and connects through a conduit to an inside evaporator mounted high on the wall or ceiling.The condenser sits outside, it doesn’t let in street noise, and the indoor fan is whisper quiet.The system can be mounted anywhere thanks to the small size of the indoor and outdoor components. The conduit, which houses the power cable, refrigerant tubing, suction tubing, and a condensate drain, runs through a 3-in. hole hidden behind the indoor evaporator.Zoning flexibility lets you cool rooms individually.Professional installation costs $1,500 to $2,500 including parts and labor. You can install it yourself, but it's fairly complicated and you'll most likely void the manufacturer's warranty. Systems with an efficiency rating of 16 or higher qualify for the federal tax credit in 2010.In-Wall AC UnitAn in-wall air conditioner is basically the same as a window unit.

The primary difference is that it has vents on the back instead of along the sides and it sits flush or extends only slightly farther out from the exterior wall. Main AdvantagesPermanent installation means you don’t have to lug it in and out twice a year, and it’s not an easy entry point for burglars.It doesn’t block a window.The chassis unit sits securely inside a metal sleeve that is installed into the wall. The chassis unit slides out for easy servicing.The size of the unit isn’t limited to a standard window opening, so it can be bigger and more powerful than a window unit.Main DisadvantagesInstallation is more involved. Cutting a hole in the outside wall of your home may be difficult depending on the exterior sheathing of your home.You may need to install a new electrical circuit. Some larger units require 240 volts (although most smaller units can be plugged into a standard 120-volt outlet).Energy Star-qualified models use 25 percent less energy than models made before late 2000.

Check with your utility for energy rebates. Some units provide both cooling and heating. Prices range from $400 for cooling a 400- to 700-sq.-ft. room to $700 or so for cooling/heating a 1,000- sq.-ft. space.Ventilator FanIf you have a hot room in an otherwise comfortable house, you can pump existing cool air into that hot room using a special fan installed in the wall or floor. Main AdvantagesNo extra cooling costs. The level-to-level ventilator fan (shown) moves existing cool air from one level (from the basement or a mini-split system, for example) to another level of the house through an adjustable sleeve installed through the floor/ceiling.A ventilator fan can blow conditioned air up or down, depending on the position of the blower unit. There are also room-to-room ventilator fans to move the conditioned air.Main DisadvantagesTo install the fan, you’ll have to cut a hole through the floor/ceiling and run an electrical line to the unit.It’s only practical if you have an abundance of existing cool air that’s easily accessible to your hot room.

Level-to-level ventilator fans (around $200) can also be used to move warm air through the living space during the winter. Search online for “level-to-level fan.”Duct or Vent Booster FanIf you have forced-air cooling but there's still a room that's hotter than all the rest, a duct or vent booster fan can increase the flow of cool air into that room. You mount the fan near the outlet and it automatically kicks on when your cooling system runs. Vent and register booster fans sit directly on top of or replace ceiling, floor, or wall registers. Depending on the model, you can set it to operate automatically, control it with a switch, or operate it by a remote control.Main AdvantagesEasy to install and use.Register and vent duct booster fans cost $40 to $100.Main DisadvantagesLess powerful (and cheaper) in-line units have a lighter-gauge housing that is more prone to rattling.Duct or vent booster fans may not make a significant cooling difference if your ductwork or overall cooling system is inefficient, sized improperly or faulty.