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Air Conditioning Service Repair Help


DIY Do It Yourself Air Conditioning Repair Help

On a Central Air Conditioning Unit : Common Questions

Is the wall thermostat set to Air Conditioning? Is the fan setting on Auto? If Yes

Is either of the units running? The inside unit (air handler)? The outside unit (the condenser)?

If the air handler is not running. Is the Blower Cover in place depressing the cover safety switch?

When accessing the electrical compartment of the air handler: Does the air handler have a air handler control board with a LED that flashes to show what the error is? If so count the number of flashes and compare that number with the legend on the wiring schematic.

If the air handler does not have a air handler control board: Find the fan relay, you will need a multimeter to find if the fan relay has 24 volts going to the fan relay coil,be sure the cover panel safety switch is depressed. 24 volts Y/N? If Yes is the fan motor relay supplying power to the air handler fan motor? If Yes the problem may be the air handler fan motor or the motor run capacitor.

If No If the energized fan motor relay is not supplying power to the air handler fan motor you may need to replace the fan motor relay.

If the inside air handler is running properly: Is the Condensing Unit Outside Running? Yes

If so, is the compressor running? If so, is the small copper tube leaving the outside condenser unit warmer that the larger copper tube? If the small tube is very hot then the condenser coils may need cleaning. Disconnect the power supply going to the outside condenser unit. Using a garden hose, with the power supply interrupted, spray water straight through the coil fins to clean the dust and dirt from them.Be sure to spray the water parallel to the fins so that they do not become bent or damaged. When finish wait 15-30 minutes then turn on the power supply to the outside condenser unit. After 15 minutes of running, is the inside air handler circulating cooler air than before? Normally a 15-20 degree temperature difference will be attained between the inside air handler intake and the inside air handler exhaust.

If the inside air handler is running properly: Is the Condensing Unit Outside Running? No

Disconnect the High Voltage Supply to the outside condensening unit. Remove the cover on the outside condensening unit electrical compartment.

Is the Power Contactor inside the outside condenser unit electrical compartment Energized? No

Is the Low Voltage Power Supply providing the minimum low voltage requirement to the Power Contactor? If Yes, you may need to replace the condensing unit power contactor. If the low voltage is not present? Then follow the low voltage wiring back to the low voltage transformer inside the air handler,checking for breaks in the wire. If the low voltage transformer has line voltage entering the low voltage transformer primary but no low voltage is coming out of the secondary transformer side: replace the low voltage transformer.

Is the minimum line voltage requirement coming through the Power Contactor? Yes

Is there the same voltage at the Power Contactor input as the output?

If Yes and neither the condensing fan motor or the compressor is running the problem may be in the condensing unit dual run capacitor.

Help Replacing a Universal Fit Air Conditioning Condenser Fan Motor

Help Increasing Your Air Conditioning Cooling Ability

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Spring Time Appliance Needs

Every Home needs some maintenance from time to time.This will generally cause your home to operate efficeintly. To help remember to do this we can associate home maintenance with the season of the year.Lets start with spring.

Spring Time Appliance Needs Start in the Kitchen

Your refrigerator and air conditioning have need of attention before the temperature rises. Both appliances move heat from one location to another. It is vital that the appliance can release the heat in order to run at the lowest cost to you.You should vacuum or brush the dust off the condenser(the coils on the outside of the refrigerator) and make sure the fan motor near these coils is running while the refrigerator is running. The cardboard back is very important to your refrigerator,make sure it is attached and covers the compressor area.Your Air Conditioning unit works the same as the refrigerator,it moves the heat from inside the house to the outside.In order for it to operator at the lowest cost you should keep it clean .The Air Handler (the part that circulates the inside air) should have a air filter, that filter should be checked monthly during high usage months,if it is covered with dust the unit will run longer and cost more to use. Clean or replace your air filter regularly.

Spring Time Appliance Needs the Air Conditioning

The Condensing unit( the section outside that releases the heat )should be checked monthly in high usage months.The cooling fins on the coils should be kept straight and dust-free to release the heat that the coolant is carrying.The fins should be rinsed out with water using a garden hose the first days of usage every spring.Better late than never if you are just now thinking off it.There should be a electrical power disconnect on the wall closest to the condensing unit.Shut the power off before cleaning the fins with a hose.If you live generally dusty or in a high construction area or road construction area this may need to done more often

Fall Appliance Maintenance Needs :

Its a good idea to change your clothes washers water inlet hoses every 5 years.I have driven up driveways where water was still running down the driveway from a washer water hose that burst, one house had a sunken livingroom that was full of water from a broken washer hose. Often before a hose burst it will have a visible
bulge in it, I exhort everyone to inspect your water hoses for
this telltale sign.I’ll put our hoses on sale to make this job easier.

Steve Hesseltine

Calls us for your home maintenance needs at 601-939-3178
For Home Maintenance Service near Jackson Ms including near Madison,MS., near Ridgeland,MS.,near Brandon,MS., near Flowood,MS., near Pearl,MS., near Clinton,MS.,near Byram,MS., near Terry,MS., near Richland,MS., near Florence,MS.
Locally Owned and Managed here for 34 years

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Help Replacing a Universal Fit Air Conditioning Condenser Fan Motor

Help Replacing a Universal Fit Air Conditioning Condenser Fan Motor.
The Motor you choose should be the Same voltage, Same horsepower or greater, Same R.P.M.,Same rotation or bidirectional rotation, and the ability to be mounted the same way your original motor is,shaft up or shaft down,horizontal or vertical.
This illustration applies to the Fasco d7909, d7908, d7907 fan motors

In most cases you will by a motor that uses its own run capacitor,the motor will have 2 wires that go to that capacitor as shown here.

The motor will have 2 line voltage-in wires normally labeled L1 and L2. These wires will usually attach to the power contactor opposite the line voltage in from the power source as seen here.

If the motor is rotating the WRONG DIRECTION the you can REVERSE the rotation by changing the order of the Directional wires, the pictures show a motor with 4 wire,2 yellow joined together and 2 violet joined together, to reverse the rotation on this motor simply unplug the yellow and violet wires and join each yellow wire to a violet wire as shown.

If your original fan motor used a dual capacitor with the same capacitor rating as the replacement motor, you could use an alternate 3 wire connection as shown here