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THE THERMOSTAT CONNECTION BETWEEN CONDENSER AND EVAPORATOR, HOW IS IT?

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Normal striaght cool unit have a two wire set up. Connect to Y on tsta and common on Air Handler. Heat pump has 5 wire set up on most. Russ

Posted on Aug 01, 2009

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I have no cold air in my refrigerator or Freezer. It defrosted everything.


Condenser Coils are Dirty
If the refrigerator is not cold enough the condenser coils may be dirty. The condenser is like a radiator and must stay clean in order to dissipate the heat which was removed from the inside of the refrigerator. As the coils get dirtier the refrigerator becomes less efficient, which makes it work harder to cool down. If the coils are dirty enough, the unit will never be cold enough and will not be able to cool the inside of the refrigerator to the proper temperature.
Evaporator Fan Motor
If the refrigerator is not cold enough, the evaporator fan motor might have failed. Every refrigerator has a set of coils called an evaporator. The refrigerator may have one or more evaporator fan motor(s) depending on the model and evaporator locations. The evaporator fan motor circulates the cold air from the coils thru the compartment. If there is only one evaporator it is in the freezer side. If the fan is not working, no cold air will get to the refrigerator compartment. The freezer may still get cold.
Condenser Fan Motor
If the refrigerator is not cold enough there might be something caught in the condenser fan motor blade, or the condenser fan motor might be defective. The condenser fan motor draws air over the condenser coils to cool them. The condenser fan motor is located underneath the refrigerator near the back. Pull the refrigerator out from the wall and remove the access panel to access it.
Start Relay
If the refrigerator is not cold enough, the start relay may be defective. The start relay is a small device mounted to the side of the compressor. It provides power to the run winding along with the start winding for a split second at start-up to help get the compressor started. If the start relay is defective the compressor may run intermittently or not at all and the refrigerator will not get cold enough. The start relay should be replaced if defective.
Temperature Control Thermostat
If the refrigerator does not get cold enough the temperature control thermostat might be defective. The thermostat allows power to flow through to the compressor, evaporator fan and condenser fan. If the cooling system fans and compressor are running, but the refrigerator or freezer is not cooling correctly check for an airflow or defrost system problem.
Start Capacitor
If the refrigerator isn't cold enough the compressor might be having difficulty starting. The start capacitor serves as a battery to give the compressor a little boost during start-up. If the start capacitor is burned out the compressor might not be able to start and run as often as it should. Test the start capacitor first with a capacitance meter, they don't fail often. If it's defective, replace it.
Thermistor
If the refrigerator is not cold enough the thermistor might be defective. The thermistor is a sensor which monitors the air temperature. It is connected to the control board. If the thermistor is defective the refrigerator does not cool or may cool continuously.
Temperature Control Board
If the refrigerator is not cold enough the temperature control board might be defective. The temperature control board provides the voltage to the fan motors and compressor. These boards are often misdiagnosed. Check all other components to be certain this is the cause of the problem.
Compressor
If the refrigerator is not cold enough, the compressor might be defective. The compressor is a motor which compresses the refrigerant and circulates the refrigerant through the evaporator and condenser coils. There are several other components which are more likely to be defective if the compressor doesn't work. If the compressor itself is defective a licensed professional will need to replace it.
Main Control Board
If the refrigerator is not cold enough the main control board might be defective. This is not common. Check the defrost system, cooling fans, and cooling controls first.

Jun 28, 2017 | Refrigerators

1 Answer

Air condition


It may be a dirty evaporator that is blocking up with ice forming in the gunk. It may also be a faulty thermostat that is connected to the evaporator and controls the ac clutch operation. The evaporator is that bit under the das and the thermostat will be next to it . Have it checked out by an accredited ac specialist as it is not a job for beginners.

Jan 26, 2014 | 2008 Nissan Versa

1 Answer

Excessive condensation dripping inside refrigerator


Bonjour,
Some refrigerators have heaters mounted in different places around the unit to take care of condensation. If those heaters don't work, you see drips. Another common cause to much frost/ice build up on the freezer evaporator coils or in the area beneath, below or around the evaporator coils. That's usually a sign of incomplete defrost cycle. Another cause could be broken or shifted insulation that's letting very cold air get to the back side of a partition that has warmer air on the other side. The warmer side drips condensation.
Based on the condenser coil cleaning results and not having any temperature data. In your case I would guess incomplete defrost. That leads to defrost timer, defrost heater, defrost termination thermostat and clogged evaporator drain line. Or some combination of the four.

Jul 11, 2012 | Frigidaire Refrigerators

1 Answer

MY GE ROOM AIR CONDITIONER AGH08AJG1 SWITCH BETWEEN COOL AND FAN EVERY 5 MINUTES APROXIMATELY NEVER SATYS COOLING UNTIL THE DESIRED TEMPERATURE IS REACHED


Check and clean the filter if found to be dirty. It is usually behind a decorative panel below the cold air output grates (when the cold air is on the top front).

steve_con_75.jpg
The filter is behind the large, rectangular, slotted front panel. The evaporator coil is behind the filter. The fan behind the evaporator pulls the room air through the filter and evaporator coil where it is cooled and dehumidified. It is then discharged through the grates on the top of the front.

Direct the airflow from the unit up and away or left / right to prevent the cool air from being drawn in the front of the unit (this is where the thermostat sensor is located). Use the highest fan speed to help force the air away from the intake, too. Inspect the condenser and evaporator coils (condenser is outside and evaporator is directly behind the filter. Clean if dirty or icing over. Be sure to install a filter if none was present. There are products made specifically for cleaning between the fins of the condenser and evaporator coils. Use them only as directed.

steve_con_78.jpg
steve_con_76.jpg

If these suggestions do not work, you may have a problem with the thermostat, refrigerant level, condenser or condenser fan.

Good luck!

Jun 22, 2011 | Heating & Cooling

1 Answer

How to wire condenser and air handler to the t-stat


Assuming this is a standard unit the thermostat connections you will use: Y, R, G, W and possibly C.

Run two conductor thermostat wire to the condenser. The condenser will have two wires to connect. Connect the two conductors to the condenser wires and run them in to the air handler.

At the air handler, connect the two condenser wires to: Y (yellow) and C

Run 4 or 5 conductor thermostat wire from the air handler to the thermostat. At the thermostat, connect the yellow wire to Y, the white wire to W, the green wire to g, and the red wire to r.

At the air handler, connect the thermostat wires: White to w1, yellow to Y, green to G, and red to R

*Y will now be connected to the thermostat and the condenser
*If you have 5 conductor wire to the thermostat, connect the last wire (which is probably blue) to C
At the air handler, connect the last wire (blue) to C. This will enable you to have 24 volts at the thermostat in case the thermostat actually requires 24 volts to operate it.

R=hot
G=fan
Y=cool
W=heat

May 19, 2011 | Heating & Cooling

1 Answer

Does not blow cold air even when it is on the coldest temp


try to check if your ref. has a evaporator fan if have try to check if operational. check your thermostat if ok by setting it to coldest and compressor continues operation if not thermostat need replacement. try to check yor condenser fan then condenser if dusty. observe unit.

Feb 03, 2011 | True Refrigerators

1 Answer

Common problem and solution on condenser of carrier air con.


dirty evaporator filter and or coil, dirty out door condensing coil, defective thermostat.

Feb 21, 2010 | Carrier BCA101R Air Conditioner

1 Answer

Doesnt get cold??


Okay,
Defective compressor, refrigerant low from a leak in the system, dirty condenser coils, condenser fan not working, bad compressor relay or capacitor, main thermostat control not working, thermostat needs to be set at proper setting, frozen evaporator coils do to faulty defrost timer, defrost heater coil broken, or the defrost determination thermostat has stayed in the open position, which would result in no defrost and the ice blockage would stop air the circulation, defective evaporator fan, defective door switch which controls the evaporator fan when one opens and closes the freezer door. Freezer drain clogged which would possibly cause the fan to be stuck because of ice built up around it.

Oct 13, 2009 | LG LFX25971ST Bottom Freezer French Door...

1 Answer

No cold air


hi..
The evaporator coils on the front of the air conditioner get very cold during normal operation of the air conditioner. As the warm moist air in the room comes in contact with the cold evaporator the moisture in the air condenses out of the air and attaches to the evaporator coil. As more and more moisture condenses the water begins to drip down into the base of the air conditioner where it is evaporated to the outside of the house.... so the problem might be in ur evaporator coil.. try replacing the coil if u are an expert or else with the help of technician try to fix it..
Is the thermostat knob turned to the proper setting? Is the compressor motor running? The compressor is a football-sized case with no apparent moving parts. It is located inside the air conditioner at the center. Is it humming or making any kind of continuous noise or causing the lights to dim? If it is making a continuous noise, and your air conditioner is still not cooling at all, there may be a serious problem with one or more of these areas:
Compressor
Condenser
Evaporator
These items are not user serviceable. You will need to contact a qualified appliance repair technician to repair these components.

If the compressor is not running but you do have power to the air conditioner there may be a problem in one or more of these areas:

Compressor
Overload and/or relay
Thermostat (Open thermostat)
Burnt wiring
Bad selector switch
Capacitor..

Jul 02, 2009 | Campbell Hausfeld Maxus 30 - Gallon Air...

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