Obtain Your License
Pursuing a career in the HVAC field? Study at home for your Connecticut HVAC license exam with our fully online, user-friendly, and self-paced course.
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Connecticut Limited Heating Cooling License (D-3 and D-4) Complete Package
$626.95View ProductThe Connecticut Limited Heating Cooling License (D-3 and D-4) Complete Package includes the following:
- Connecticut Limited Heating Cooling License (D-3, D-4) Exam Prep
- 2021 International Mechanical Code
- 29 CFR OSHA 1926 Construction Industry Regulations & Standards, January 2023 Edition
- Connecticut Limited Heating Cooling Tab Pack
The highlighting guides and quizzes are designed to familiarize students with testing materials. We do not provide students with exact test questions, as the state does not release this information. -
Connecticut Limited Heating Cooling License (D-3 and D-4) Exam Prep
$219.99View ProductThe Connecticut Limited Heating Cooling License (D-3 and D-4) Exam Prep takes you through each one of the reference books on which the exam is based. After your highlighting is completed with each book, you have the option take an online practice test to reinforce concepts presented. The highlighting guides and quizzes are designed to familiarize students with testing materials. We do not provide students with exact test questions, as the state does not release this information.
Requirements To Complete
About This License
D-3 Contractor
The holder of this license may perform the installation, repair, replacement, maintenance or alteration of all refrigeration systems included in food storage, air conditioning, or special process systems. The requirements to qualify for this license examination shall be two (2) years as a properly licensed journeyperson or equivalent experience and training.
D-4 Journeyperson
The holder of this license may perform the installation, repair, replacement, maintenance or alteration of all refrigeration systems included in food storage, air conditioning, or special process systems, and only while in the employ of a contractor licensed for such work. The requirements to qualify for this license examination shall be the completion of a registered apprenticeship program or equivalent experience and training.
Requirements to Obtaining Your License
- Pre-approval is required.
- Apply through the Connecticut State Department of Consumer Protection.
- Journeyperson applicants must attach the original copy of the Letter of Apprenticeship Completion Certificate.
- Contractors are required to document 2 years of experience.
Applying For Your License
- Pre-approval is required.
- Fees: Contractor $150.00; Journeyperson $90.00
- Apply through Connecticut State Department of Consumer Protection
Exam Details
- Topics include Refrigeration and Refrigerants, Components, Controls, Valves and Wiring, Piping and Tubing, Tests, Inspection and Maintenance, and Safety.
- To schedule your exam, contact PSI at 1-800-733-9267.
- $65 for 1 portion or $130 for both the trade and the business and law
D-3 Contractor Exam
- 50 questions
- 2 hours
- 70% required to pass
D-4 Journeyperson Exam
- 40 questions
- 1.5 hours
- 70% required to pass
Books and References for the Exam
The following references are permitted to be taken into the examination. They are available for purchase from our online contractor’s bookstore or by calling our office at 1-800-952-0910.
- 2015 International Mechanical Code
- OSHA 1926
- Modern Refrigeration and Air Conditioning
Exam Review Education
We offer review for the Connecticut Limited Heating-Cooling exam through online exam review. The program takes you through each one of the reference books that the exam is based on showing you exactly what to highlight. After your highlighting is completed with each book, you have the option take an online practice test to reinforce concepts presented. Also, there is an extensive math and plans analysis portion. The program narrated and animated.
Continuing Education
None
Reciprocity Agreement
There are no reciprocal agreements for this license as of this time.
