Haier HF-180T, Service Manual

17 

6 Common Troubles in Refrigerators and Their Remedies 

Causes for troubles occurring in refrigerators are closely related to the 

quality of components and workmanship in assembling by manufacturers 
as whether refrigerators are properly used and maintained .The parameters 
generally used to express the working conditions of a refrigerator include 
the temperature inside the refrigerator ,operation rate ,electric power 
consumption ,noise level ,and other functional indexes .If any one of these 
parameters is beyond its permissible range ,this indicates that there is a 
fault or trouble in the refrigerator . 

During the whole service life of a refrigerator ,the probability of troubles 

occurring within a union time is called its failure rate .Making a comparison 
between the control circuit system of a refrigerator and its refrigerating 
system ,we can find that the failure rate of the former is higher ,and that of 
the thermostat is the highest . In troubleshooting ,the first thing you must do 
is to determine where the trouble comes from --- the control system or the 
refrigerating system .There is general no trouble indicating instrument 
mounted on the domestic refrigerator ,locations and natures of troubles 
should be determined according to their respective 
features ,therefore ,experience in servicing is very important to 
troubleshooting .Service technicians with rich experience can correctly 
locate them and take reasonable remedy measures based on their 
comprehensive analysis of trouble characteristics as well as operating 
conditions for various kinds of refrigerators . 

Three Essentials for Checkup 

1) Look

a)  Check the tubing of refrigerating system for cracks and various 

welding points for leaks ;if leakage occurs ,an oil stain can be seen 
definitely . 

b)  Check the suction and exhaust pressure values (high pressure and 

low pressure) of compressor to see whether they are normal . 

c)  Check the conditions of frost attached to its evaporator and gas 

return tube .It is abnormal if frost has formed on part of the evaporator or 
there is no frost attached to it . 

d)  Pay attention to the speed of temperature drop inside freezer 

compartment .It is abnormal if the speed of temperature drop is obviously 
slower than the corresponding normal speed . 

e)  Check the environment to see whether it is suitable for placing a 

refrigerator . 

f)  Check refrigerator door seal ,case ,table surface and heat insulation 

layer . 

g)  Look at the main control board to ascertain if various indication 

states are normal. 

2) Listen 

a) Listen to the noises produced when the compressor is running 

Maintenance Service and Trouble Shooting