• SkillCat Team

Major and Minor Repairs

EPA 608 Type 3 Chapter 11 (Take full course for free)


In this module, we will learn about EPA’s classification of major and minor repairs. Skip to quiz!


1. Major Repairs


EPA defines major repairs as “Maintenance, service, or repair that involves removal of the appliances"

  • Condenser

  • Evaporator

  • Auxiliary heat exchanger coil or

  • Compressor”

Apart from these, any other repairs are considered as “minor repairs.”


An evaporator or condenser coils are removed/replaced if there is an irreparable flaw in it. Examples of an irreparable flaw would be if the coils have rusted or a hole in the coil piping is so big that it cannot be closed by repairing it.


Evaporator and condenser coils are types of heat exchangers. An auxiliary heat exchanger means a secondary or an extra heat exchanger in the system. It is generally seen in heat pumps and large systems cooling vast spaces.


Examples of major compressor repairs are

  • A compressor burnout, causing its replacement.

  • A non-working compressor due to mechanical problems.

  • A broken or leaking compressor.

We will talk about compressor burnout in more detail.


A compressor burnout is a major repair, and an oil sample is taken to detect it. A sample of the oil is taken to check its properties whenever there is a compressor burnout. A compressor burnout means that the compressor's motor windings have burnt due to a short circuit.


A short circuit in the electrical component produces very high voltage and temperatures. This burns the refrigerant oil during a burnout. Burnt refrigerant oil has acidic properties that harm the system.


While repairing any system, a technician should follow these steps,

  • Isolating the component.

  • Evacuate the isolated section.

  • Wait for a few minutes to see if the pressure rises in the system.

Recall that all this has been discussed in the evacuation topic.


2. Minor Repairs

Apart from all the repairs mentioned above, any other repairs are considered as minor repairs. For any such repairs, we generally use the method of heating the system using heating blankets to detect leaks. All repairs are done after detecting leaks and recovering refrigerant if needed.





3. Conclusion


In this module, we understood EPAs classification of major and minor repairs. These classification of major repairs is an important part of the EPA Type 3 Course.


Question #1: A "major repair" under EPA's regulations would be;

  1. Replacing a condenser coil.

  2. Replacing a filter-drier.

  3. Replacing a condenser fan motor.

  4. Replacing a blower fan motor.

Scroll down for the answer...











Replacing a condenser coil.

EPA defines major repairs as “Maintenance, service, or repair that involves removal of the appliance

  • Condenser

  • Evaporator

  • Auxiliary heat exchanger coil or

  • Compressor”

By this definition, replacing a condenser coil is a “major repair.”


Question #2: We would take an ____ if a unit has a compressor burnout, and it is considered a ____.

  1. refrigerant sample; major repair

  2. air sample; minor repair

  3. oil sample; major repair

  4. oil sample; normal repair

Scroll down for the answer...












oil sample; major repair

A compressor burnout is a major repair, and an oil sample is taken to detect it.

A sample of the oil is taken to check its properties.


5 views0 comments

Recent Posts

See All

5925 Almeda Road

Houston TX 77004

(713) 364-2207

© LearnToDrill 2020. All rights reserved.