Tag: How To

HVAC industry news, how to procedures including technical tips, product features and more.

Diagnosis and Troubleshooting A/C Systems

Proper A/C system performance is achieved with many components working together to provide cab comfort for the driver and passengers. The item that receives the most attention is the Compressor. The compressor operates as the “pump” of the system, keeping the refrigerant circulating and increasing the refrigerant’s pressure.

All compressors have two sides: Suction and Discharge. The refrigerant is drawn into the compressor’s suction side as a cold-low pressure vapor and then is compressed, thus raising the refrigerant pressure and temperature. The high pressure-high temperature vapor refrigerant is then pumped out of the compressor’s discharge side to the condenser.
As the compressor moves the refrigerant through the system, the refrigerant oil also moves with the refrigerant.

AC System - Replacement HVAC Parts & Supplies - ATC I 1-800-295-4156


Why are compressors removed?

1) Loss of a refrigerant charge – Cold refrigerant entering the compressor on the suction side coming from the evaporator provides cooling to the compressor. With a loss of refrigerant, the compressor overheats. Also, with a loss of refrigerant, the oil is not returned back into the compressor and eventually the compressor will run dry. AC Compressors - Replacement HVAC Parts & Supplies - ATC 1-800-295-4156

2) Contamination – Particles found inside the system will cause internal damage to your system. These particles can cause blockage at the condenser, expansion valve or damage to the internal parts of your compressor. Contamination must be removed from the system by using the correct flushing procedures.

3) Misdiagnosis – Change the wrong part is a common procedure in repair A/C failures. The system must be properly diagnosed before changing parts and pieces.

What are the most common causes of compressor failures?

1) Low Refrigerant Charge AC Compressors - Replacement HVAC Parts & Supplies - ATC 1-800-295-4156
2) Leaks with the System
3) Contamination in the System
4) Lack of Lubrication
5) Clutch Failure due to System Failure
6) Blockage or Restriction within the system
7) Insufficient Condenser Cooling

What happens if a compressor continues to run under a low refrigerant charge?

1) Overheating of the compressor occurs. AC Compressor - HVAC Replacement parts & Supplies - ATC I 1-800-295-4156
2) Refrigerant oil circulation slows down and returns very little back to the compressor
3) Without proper lubricant and refrigerant charge, the compressor will “lock-up” and destroy the compressor.
4) The critical low charge point is reached when the system has 50% or less of the recommended refrigerant charge.
5) Disabled or Malfunctioning switches that allow the compressor to run in a low charge situation.

With mechanical reliability at all-time highs, heavy-duty A/C components rarely fail. In fact, components mainly fail because of the contaminated refrigerant oil and general lack of preventive maintenance. Proper maintenance increases operating time and saves money by identifying concerns before they become problems.

More Pre Season maintenance tips

A/C Preventative Maintenance
A/C Systems – How a simple inspection can save
How To Inspect an A/C Compressor
A/C Compressor Check Up
How To Troubleshoot your A/C Electrical system

Best selling mobile HVAC parts by Make


Completing the A/C Best Practices on our Youtube channel ATCTV, we feature
Basic Troubleshooting
How To and Which Components to Inspect
Examining Compressor Failures
Thermistor Kit for Navistar

Arctic Traveler Canada is always focused on the application of Air-Conditioning, Heating, Pressurization and Refrigeration of cabins and cargo areas of mobile vehicles, both on-road and off-road. As a Master Stocking Distributor, ATC offers Air Conditioning systems and replacement parts for any heavy duty vehicle. Call 1-800-295-4156 or visit www.atc.ca for more information.

ATC Connect- Parts lookup and cross reference made easy

As a supplier of quality HVAC Parts and Supplies, Arctic Traveler is the choice for All Make HVAC products. We know that having the right part is paramount to getting the job done right! In our continued efforts to be a leader in the industry, we are proud to share an exciting new tool for A/C components, ATC CONNECT. This tool provides OEM cross references, specs, pictures, technical tips, on-hand inventory and so much more. To get access and start using click here
ATC CONNECT is a parts lookup and cross reference tool for All Make, HVAC Parts & Systems. Call 800-295-4156 for details.

Heavy Duty Hvac News & Tech Tips

Heavy Duty HVAC Parts, Supplies, Solutions & Technical Tips

Spring is here and with it, the return of warmer weather and the start of what we all hope will be another busy A/C season. We want to take this opportunity to remind you of the following resources – ATCPARTS, ATC Connect, Catalogs and our blog ATCNEWS.

Ordering Parts – While we do look forward to speaking with you, we know that sometimes you simply want to “place an order” rather than wait in a queue while we assist others. To better serve you, We encourage you to email us at atcparts@atc.ca

ATC Connect – Parts Lookup and Cross Reference made easy
Arctic Traveler provides an exciting tool for HVAC components, ATC CONNECT. This tool provides OEM cross-references, pictures, technical tips, on-hand inventory and so much more. Click here to get access or speak with our Customer Service Reps to start utilizing this exciting and useful tool.

Our Blog ATCNEWS is how we share Best Practices and Technical Tips. With mechanical reliability at all-time highs, heavy-duty A/C components rarely fail. In fact, components mainly fail because of the contaminated refrigerant oil and general lack of preventive maintenance. In this edition, we feature 4 articles on A/C system maintenance and a best-seller list of components by Make.  
A/C Preventative Maintenance,
A/C Systems – How a simple inspection can save
How to inspect an A/C Compressor
How to troubleshoot your A/C Electrical system
Best selling mobile HVAC parts by Make

Completing the A/C Best Practices on our Youtube channel ATCTV, we feature
Basic Troubleshooting
How To and Which Components to Inspect
Examining Compressor Failures

Cabin Air Filters – Reduce dust, dirt and allergens – A relatively new feature on the automotive scene, the cabin air filter is often overlooked in regular vehicle maintenance. This filter is just as important to the passengers as the engine air filter is to the vehicle and a likely cause of “A/C Not Blowing Cold Air“. A cabin filter processes the air that enters the passenger compartment via the vehicle’s heating and air conditioning system, increasing passenger comfort by trapping particulates, pollen, and other irritants. See more here

A/C Hose Program – Replacements & Repairs
With today’s wide range of fittings and hose, finding a replacement hose could not be any simpler. Whether you need an OE replacement, repair, or getting a custom-made hose, you can find it at ATC. Read more about our Hose Program here.


To view all our offerings, visit Product Lines to access catalog downloads or call us toll-free at 1-800-295-4156, our Customer Service Representatives will be happy to assist you.

Replacement Coils & Heat Exchangers don’t have to be from the original manufacturer.
For over 30 years, Custom Coils Canada has produced replacement condensers, evaporators and heater cores for almost any mobile, commercial or industrial application. CCC services the replacement coil market in the GTA and specializes in building unique heat transfer coils and aftermarket drop-in replacements. Call 905-789-8523 to find out how our 30 years of heat exchanger experience can help you.