Turbo Air Model TGF-23F Wont get cold. Compressor comes on and runs but evaporator fan isn't running.

Your fridge operates like that: a compressor liquefies freon vapours; this creates heat so the hot liquid goes thru a cooling radiator with a fan on it (these 2 elements are at the rear bottom of the fridge) the freon fluid goes to an evaporator, turns to vapour and absorbs heat in the process, cooling the evaporator; a fan blows air over the evaporator and spreads the cooled air all over the fridge; the vapours return to the compressor.
In the rear of the fridge you should make sure that the radiator is clean and the fan working; inside the fridge you should make sure that the evaporator is not covered in ice and/or dirt and its fan is working. If necessary clean both.
If they are clean , the fans work but the evaporator isn't cold then either the freon circuit has sprung a leak and all the fluid has been lost or the compressor isn't working - to find out which just put your hands on the compressor : if it's hot and vibrates the fluid has been lost, if it doesn't vibrates then the compressor isn't working.
The compressor isn't working because either the thermostat or itself have failed. To find out which the compressor will have to be powered directly from the mains: if it starts then the thermostat must be replaced, if it doesn't the compressor will.
To fix the freon circuit or to replace the compressor a certified professional is mandatory, you must call one.

Did they test the thermostat? I would think that the compressor would kick on before you got that much of a fluctuation, unless the thermostat is not sensing the change fast enough.

The run and start capactiors and relay, did they give you a reason for that? When the compressor kicks on does it surge the power? Light dim or something? It is hard to guess without being able to put an o'scope on your machine to be able to see what it is doing, but just based on what your write-up was, I can't see the parts you said they want to replace will fix the problem.

Difficult for you to check this I'm afraid, if the fan on the cooling unit is working unless you have an experienced 'ear' you will not hear the compressor running or worse still occasionally clicking.
Possible faults are
1. Compressor not running (the fan will run even if the compressor does not) electrical fault
2. Compressor seized (consult your service guy) also true for the rest of these
3. Compressor not pumping
4. Refrigerant leak

Not much hope for a cheap repair

If you have just turned it on it takes awhile for the fans to come on. The evaporator coil has to get cold about (10 to 20 degrees) and make a klixion fan switch to turn the fans ON.... Is the evaporator coils getting a frost pattern on them??? If not then the system may be low of Freon.. If the coil is completely froze up and you are getting frost back to the compressor..... then you have a bad fan switch or a door switch.... If you have a wiring diagram you can trace out the wiring.... It is usually down by the compressor or control panel... hope this helps.

Cut everything off for a few minutes then turn it back on and listen for a click from the compressor relay as the compressor tries to start.
Is the compressor motor running.If no check starter/overload relay. Check to see if the condenser fan at the back underneath near the compressor is running. If no check fan.

Are the condenser coils near there warm or room temp. should be warm


How to check stuff>
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php


Is the evaporator fan in the freezer running. It blows cold air into the fridge side through a damper in the wall between the freezer and fridge. Make sure the damper is open.

Below the evaporator fan is the evaporator coils. Remove the back cover in the freezer to observe the frost pattern. Light frost everywhere(NORMAL) or a partial pattern of ice(LOW ON FREON) or nothing(LOW FREON OR COMPRESSOR PROBLEM).
If it's iced up really heavy you have an auto defrost problem. Melt the ice with a hairdryer and check the defrost system.

. Cut everything off for a few minutes then turn it back on and listen for a click from the compressor relay as the compressor tries to start.
Is the compressor motor running.If no check starter/overload relay. Check to see if the condenser fan at the back underneath near the compressor is running. If no check fan.

Are the condenser coils near there warm or room temp. should be warm


How to check stuff>
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php


Is the evaporator fan in the freezer running. It blows cold air into the fridge side through a damper in the wall between the freezer and fridge. Make sure the damper is open.

Below the evaporator fan is the evaporator coils. Remove the back cover in the freezer to observe the frost pattern. Light frost everywhere(NORMAL) or a partial pattern of ice(LOW ON FREON) or nothing(LOW FREON OR COMPRESSOR PROBLEM).
If it's iced up really heavy you have an auto defrost problem. Melt the ice with a hairdryer and check the defrost system.

the first thing to check is the thermostat if its stoped working them it wont be telling the compressor to start up and the unit wont get cold,,
have this looked at first as its the cheapest part to renew

dead compressor or start gear problem or start cap dead

Normal 0 MicrosoftInternetExplorer4 st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} . Cut everything off for a few minutes then turn it back on and listen for a click from the compressor relay as the compressor tries to start.
Is the compressor motor running.If no check starter/overload relay.
Check to see if the condenser fan at the back underneath near the compressor is running. If no check fan.

Are the condenser coils near there warm or room temp. should be warm


How to check stuff>
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php


Is the evaporator fan in the freezer running. It blows cold air into the fridge side through a damper in the wall between the freezer and fridge. Make sure the damper is open.

Below the evaporator fan is the evaporator coils. Remove the back cover in the freezer to observe the frost pattern. Light frost everywhere(NORMAL) or a partial pattern of ice(LOW ON FREON) or nothing(LOW FREON OR COMPRESSOR PROBLEM). Heavy frost indicates defrost problem.

5 reasons for fridge and/or freezer getting warm: 1- the evaporator coils are icing up and won?t let air circulate. 2- the evaporator fan is not working to circulate air. 3- there is no refrigerant in the system. 4- no power to fridge or compressor. 5- the condenser coils have no air circulation check under the fridge behind the vent. if it is too dusty or the fan isn?t working, it is not getting enough airflow to cool down. replace fan and/or vacuum out the dust. if there is no power to the fridge, the light will be off. if the compressor is not running, there is a defrost timer that cuts the power temporarily to the compressor to melt ice on the coils. it?s located under the fridge behind the bottom vent. If the timer is off and the compressor is not going, the compressor or the main board is bad and needs replacing. there is also a temperature sensor on the evaporator coils that tells the defrost coil to turn on and when to turn off. if the defrost timer is on but the coil is not heating up, replace the sensor. if it still won?t heat up, it?s the timer or the coil. the easiest way to tell if there is no refrigerant- the freezer wall is warm and the compressor is loud. if there is no refrigerant, it may be more cost effective to replace the fridge. if you feel no air coming from the freezer vent, the fan needs replacing. If you feel air moving in the freezer but not the fridge, the channel from freezer to fridge is blocked. if the freezer has air and the rear freezer wall has frost on it, the evaporator coils are iced up and need defrosting. causes: 1. low refrigerant 2. no fan 3. too much humid air in fridge/freezer due to door open or bad door seals 4. the condensate drain tube is clogged if the seal around the door is ripped or not completely sealing, or there is condensation at the bottom or the walls of the fridge, replace the seal(s). no air, no fan. Replace if the refrigerant is low, it just needs a top off. but you need to be certified by the epa to move refrigerant, so get a professional. defrost solutions: unplug the fridge. remove the wall of the freezer that is frosted/icing up. use a hair dryer to melt the ice. do not get too close. you will see a drain under the evaporator coil. make sure it is not blocked. the water should run freely to a condensate pan under the fridge that evaporates the condensation with the hot line from the compressor. once the coil is free of ice, frost, and water, replace the panel and repair any of the problems that caused the icing up. plug the fridge in and turn it on. If it frosts up within a week, there is still an issue that not been taken care of.