Copyright © 1997 Hannabery HVAC. However you want to word it, if your indoor fan isn't working it could be several things. We will go over a few things to check before calling for service. First make sure there is power to the indoor unit and that a switch or breaker isn't off. Some indoor units (Heat Pumps) have breakers right on the Air Handler itself. But also check the main breaker panel. Some units have a shutoff switch on the side of the unit or an Emergency Switch located on a wall. Then make sure your air filter isn't blocked. Sometimes that is the only problem. Some customers don't even know they have an air filter and it has never been checked. Try setting the thermostat fan switch to the "on" position. Feel for air coming out of the vents. If it is in the air conditioning mode, check for ice around the evaporator coil and on the refrigerant lines at the indoor unit. If the coil froze, the fan could be working but the air wont go through the ice until it melts.

If the fan isn't working, that can cause the coil to freeze. If the coil is frozen, shut off the air conditioning immediately. Then check-out our page - heat pump iced-up in summer. (Even if it's not a heat pump.) Some equipment still use belt driven motors. Mostly "low-boy" oil furnaces, especially older models. Sometimes the belts wear out, crack, and eventually break. If you take a look at the blower section of your heating system it is quite easy to see if you have a belt driven blower motor. You will see a motor sitting on top or next to a larger blower wheel connected by a fan belt. Most fans are energized by a fan relay. This is probably the most common cause. The contacts inside the relay go bad. They usually stick open, never sending the signal to the motor. This is much easier and less expensive to repair than a motor going bad. A weak, faulty, or shorted capacitor can prevent the motor from running. And of course, the motor itself can always go bad. Sometimes the bearings seize.

Or the motor just burns up or weakens.The bottom four causes in blue are commonly found problems and can be addressed, even fixed by the homeowner. Faulty relay or fan control Frozen coil due to an air conditioning problem Bad or weak motor capacitor Breaker or switch off [Must be in our service area] Please register to participate in our discussions with 1.5 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads. 756 posts, read 3,184,116 times 14,097 posts, read 19,232,707 times 3,020 posts, read 20,412,057 times More than likely it is the capacitor.............. 27,825 posts, read 27,796,107 times Yeah, if you don't know the basics about electrics 1 posts, read 234,496 times 2 posts, read 160,216 times 108,154 posts, read 40,891,666 times Originally Posted by basselghassani

It's a good possibility the capacitor is bad and the compressor is attempting to start. If the compressor and fan share a combination capacitor it could be bad and affecting both.discount portable ac unitsFrom time to time, air conditioner units need maintenance. life of hvac systemAir conditioner units contain a number of parts that work together to create the cool air that keeps your room at a comfortable temperature. determine correct size ac unitWhile large central air units require a licensed technician to repair, window-mounted units are more tolerant of a do-it-yourselfer. Troubleshooting why the fan isn’t working can help you keep your room temperature maintained and your wallet intact. Worn Out Belt The fan in an air conditioner unit is usually attached to a motor that directly turns the fan, but sometimes the interior workings include a belt that connects the fan and the motor.

If you have a unit with a belt, check to see if the belt has worn out, frayed or slipped out of place, making it impossible for the fan to turn properly. Order a replacement belt from the manufacturer and replace the belt to fix the problem. Power to the Unit While it might be the most obvious solution, check to ensure that the unit is plugged into the wall. If the connection has come loose and the power won’t turn on, your fan won’t turn. Another power problem might be a tripped switch on the circuit that supplies power to the unit. If the plug is connected and the circuit is working, unplug the unit and check the internal wiring that connects the fan motor to the circuit board. Ensure that all connectors are tightly plugged in, plug the unit back in and try it again. Circuit Board The circuit board, or control board, is what directs the fan to turn and the coolant to circulate. It also controls any timers your unit might have. Once you've verified that power is going to the unit, and the air conditioner responds when you push other buttons, you know that the problem rests somewhere in the control board or the thermostat.

These parts are replaceable, but the wiring is so complex and the part so expensive that the better option is to replace the unit if it's no longer covered by warranty. Blockage A blockage in the unit could keep the fan from working. While filters keep most dust and debris out, damage to the exterior of the unit might expose its insides to outside elements through the window and debris might become lodged in the unit. Check the interior of the unit to make sure nothing is blocking the fan from turning. Remove any blockage to restore function. Condensation Pump Not all air conditioner units have condensation pumps, but the ones that do can quit working. If the pump fills up, a trigger switch flips on inside the unit that stops the fan (and sometimes the whole unit, depending on the kill switch) from functioning until the reservoir is emptied and repaired. Normally they function on their own, but if it isn’t emptying on its own, replace or repair the pump so it dispenses condensation properly.