3 Most Common Causes of Heating & Air Conditioning Repairs
                     3  M o s t  C o m m o n  C a u s e s  o f  
H e a t i n g  &  A i r  C o n d i t i o n i n g  
Re p a i r s
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1. Limit Switch
The limit switch shuts off the 
burner when the temperature 
exceeds a preset temperature. 
When the temperature reduces to 
normal, the burner will come back 
on. The most common reason for 
limits to open is a plugged filter or a 
dirty blower wheel.
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2. Run Capacitor
At higher temperatures and higher 
voltage, the capacitors will fail more 
quickly. The temperature can be 
influenced by dust and debris 
(insulating the capacitor) in the 
compressor unit. Electrolytic 
capacitors are more sensitive to 
temperature and have a propensity 
to expand, causing premature 
failure.
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3. Circuit Board
Environmental Factors: Exposure to 
heat, dust and moisture, accidental 
impact (drops and falls), and power 
overloads/surges can be causes of 
circuit board failure. However, the 
most damaging cause of premature 
circuit board failure is electrostatic 
discharge (ESD) at the assembly 
stage.
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Cowan Air
Air conditioning is an important service for any 
industrial building. Industrial establishments are 
labour intensive. These, therefore, house a 
number of workers on a regular basis, for most 
of their day. Since these workers dedicate their 
lives to the industry, they are owed the highest 
safety and comfort standards. An industrial air 
conditioning service is thus a major requirement.
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Address:
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Phone: (03) 8586 1100 
Fax: (03) 8586 1155
Email:
   [email protected]
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