ATCNEWS

Get all the latest heavy duty mobile HVAC news, product features, how to procedures including technical tips and learn more about ATC products and services!


How to inspect an A/C Compressor

Before you pull the A/C compressor from a heavy-duty vehicle, take these steps to confirm that it really needs replacing:

1. Is The Compressor Rotation Smooth?
With the vehicle off, turn the compressor shaft with a 14-mm socket. If you feel grinding or hanging as you rotate the shaft, it’s probably due to broken components within the compressor. If the rotation is smooth, move on to Step 2.
2. Is The Coil Getting More Than 11.5 Volts?
Take a reading with the engine running and the clutch engaged. If there’s insufficient voltage, get to work on that. Otherwise, move on to Step 3.
3. Is The Coil Resistance Between 2.8 And 4.4 Ohms?
Any resistance outside this range will prevent the clutch from engaging or will cause used circuits to open. If the answer is yes, continue to Step 4.
4. Is The Compressor Able To Produce 350 Psig Or More?
If not, leave the compressor where it is. The system may have a low refrigerant charge because of a leak that needs repair, or a high-side blockage that limits refrigerant flow to the compressor.

Tech Tips from Red Dot
” We see lots of compressors that are returned fully functional and therefore not warrantable.
Get the diagnosis right. Perform a simple compressor function check before you pull the component from the vehicle.”

How to troubleshoot your A/C Electrical system

Tech Tips from Red Dot

On any vehicle, and virtually any system, electrical problems are among the hardest to troubleshoot. If you suspect an electrical problem with the A/C system, here’s a two-stage inspection routine that virtually anyone can do with no special tools or skills:

1. Inspect Electrical Connections

As you perform a visual inspection under the hood (cab) and/or at the rooftop condenser, take a moment to check all electrical connections both visually and by feel. Make sure all leads and wires are properly supported and securely connected, and that there’s no corrosion or grime on the leads or connectors.

2. Check Electrical Current Flow and Device Functions

Perform the following steps to check current flow and electrical device functions:

  • Turn on the ignition. 
  • Turn on the A/C system. This will power the thermostat and clutch. If it does not come on, use the A/C mode switch to check the leads to the switch. You should hear a “click” from the thermostat and hear the clutch drive plate “snap” against the clutch pulley. 
  • Check fuses. If all the connections are clean and tight and there’s still a failure, check the fuses in-cab as well as in-line.
  • Check A/C clutch engagement. Since you can’t see and may not hear the clutch engage, get out and look at the clutch. If it’s engaged, you will see that the drive plate is against the pulley and not slightly spaced from it. If you aren’t sure the clutch is engaged, look for the lead wire connector near the clutch. Break and close that connection. The clutch will disengage and engage again.
  • Test blower speed operation. Some systems have a common switch that turns on the air conditioner and powers the blower motor. Test blower speed operation by adjusting this or the separate blower control switch. Feeling the air flow from the ducts or note blower sound (speed) changes.
  • Inspect roof-mounted condensers. Don’t forget to inspect roof-mounted condensers and A/C units for dirt and debris. Be sure the condenser fan(s) are working properly and all parts and electrical connections are securely fastened. The roof-mounted condenser fans may come on when the system is turned on. Like the thermostat and most clutches, the normal on-off cycling action can not be observed until the engine is running with the A/C system on.

Once your visual inspection is complete, talk to a qualified A/C technician about what you found. Your troubleshooting efforts will be rewarded with a speedier repair and perhaps a lower repair bill.

Thermistor Kit

What is a Thermistor ?
An electrical resistor whose resistance is greatly reduced by heating, used for measurement and control. Thermistors, derived from the term THERMaIly sensitive reslSTORS, are a very accurate and cost- effective sensor for measuring temperature. 

Your HVAC Thermistor can be replaced with #1400K for Quicker Installation and Less Hassle! 
Our Kit contains “First Fit OE Products”  for longer life solutions to today’s A/C problems.
Check out the video courtsey of MEI here ….

International & Prostar HVAC Thermistor Kit for quick hassle free replacement of OEM part.

April/May Newsletter

Last Month we published our first Newsletter and introduced our Social Media channels Facebook and Google+. We also introduced and highly recommend using ATC Connect our parts look-up and cross reference tool, complete with tech tips, industry news and more. 

Next up was ATCNEWS, our web log with technical tips, product features and more. Our feature was on Heating Solutions, along with a RedDOT guide to Troubleshooting heaters and Espar tips on How to determine and remove carbon build up in heaters. Need a Catalog? click here to request yours today. All this and more available in searchable categories.

This month in ATCNEWS we feature the Best Selling HVAC parts by Make and Off-Road Cabin Air Filters.
 
A/C PM on ATCTV
With winter hopefully behind us, this month in ATCNEWS is a RedDOT A/C Preventative Maintenance Schedule.The article introduces our Youtube channel ATCTV where you will find videos courtesy of MEI featuring best practices on How To & Which Components to Inspect during PM and a Basic Troubleshooting guide. We hope you find this new channel exciting and the content helpful.

So much to offer, all from 1 source 
ATC is a proud distributor of a variety of brand name compressors like Sanden, Denso and York; accessories like belts, clutches, o-rings and oil for your cooling needs. We also stock a wide selection of SPAL, the world leader in fans and accessories. From simple dash fans to high performance axial fans, relay harnesses and centrifugal blowers for cars, buses and off road vehicles….whatever you need, available when you need it!. 

Our website is your doorstep to information on a variety of other product offerings.Visit the Product Line page to access catalog downloads or call us toll free at 1-800-295-4156, our Customer Service Representatives will be happy to assist you.

Unique Application or Replacement Coils
Arctic Traveler‘s coil manufacturing division, Custom Coils Canada produces tube and fin replacement condensers, evaporators and heater cores for almost any mobile, commercial or industrial application. We specialize in building aftermarket drop-in replacement coils. Call 905-789-8523 or visit www.customcoils.ca for more information. 

The opinions expressed in this newsletter, do not necessarily reflect those of Arctic Traveler Canada.

Cabin Air Filters – Increase A/C efficiency and Reduce dust, dirt and allergens

A relatively new feature in the heavy duty industry, the cabin air filter is often overlooked in regular vehicle maintenance. That’s unfortunate because the cabin air 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“. 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.

For people with allergies and other sensitivities to airborne agents, the cabin filter represents a significant advance. Replacing the cabin air filter at the recommended interval, or sooner especially in areas of high particulate, allows the A/C system to run at optimal efficiency and passengers to breathe cleaner, fresher air, which makes any journey more enjoyable – Courtesy of Denso Corporation


Arctic Traveler Canada  carries a complete line of Off Road/Agricultural Cabin Air Filters. Call 1-800-295-4156 for more info.

A/C Preventative Maintenance Schedule

When it comes to Air Conditioning a good Preventative Maintenance program will increase operating time and save money by identifying concerns before they become problems. Once the hot weather hits, implementing planned maintenance allows you to schedule repairs versus reacting to sudden unexpected issues.
Remember to always use caution when performing preventative system maintenance, as ambient conditions (heat load) will increase refrigerant hose temperatures and don’t forget having the right quality parts on hand makes all the difference. See How To and Which Components to Inspect and watch this video to learn more about Basic A/C Troubleshooting.

A/C Preventative Maintenance - a regular HVAC PM program will save you money and decrease down time.

How to use ATC Connect

Parts lookup. We made it easy and only a few key strokes away

How to Login:

From the home page of our ATC websiteATC is your gateway to a wide range of mobile heavy duty HVAC parts for commercial, industrial and On/Off road applications like agricultural, construction, forestry and mining.

In the Lower Right corner, Click On CUSTOMER LOGIN

ATC Connect is parts look up made easy and your gateway to a wide range of mobile heavy duty HVAC parts for commercial, industrial and On/Off road applications like agricultural, construction, forestry and mining.

  Enter Your Username and Password

Welcome to ATC CONNECT

Mobile Heavy Duty HVAC Parts Lookup for commercial, industrial and On/Off road applications like agricultural, construction, forestry and mining. ATC Connect, We Made It Easy.

Note the OEM Number Search, ATC Number Search & Part Description Place Holders at the top of the page.

 

Parts Lookup

In the Top left hand corner of the page, select Parts Lookup.
Mobile heavy duty parts lookup for commercial, industrial and On/Off road applications like agricultural, construction, forestry and mining. 

The Part Search drop down will appear. Select the Make
Heavy duty HVAC parts by type or make, model and year.

 The MAKE selection for this example is Freightliner, then MODEL (Columbia), then choose the YEAR
ATC_Parts_Search_Freightliner_example

All available parts by type for the Freightliner, Columbia, 20xx will be displayed including ATC Item Number. OEM cross reference number and On-Hand Inventory.  Click on the desired part to display detailed specs.

No Price is displayed, but specs on the part will be as well as availability and quantity by location.

Please note this inventory by location is only updated once daily, overnight and depending on the time of day and demand for the item, on hand Inventory could be depleted.

To return to the main menu at anytime, click on the ATC Logo.

ATC Catalogs – Order yours today

With so much information at your finger tips these days, we know Catalogs still have their place and preference. Order yours here or get access to our new parts look up and cross reference tool ATC Connect, or simply use our product line catalogs on our ATC website. Whatever your preference, we’ll ensure you find and have the right part.
Air Conditioning & Heating Parts CatalogMobile Heavy Duty HVAC Parts Lookup for commercial, industrial and On/Off road applications like agricultural, construction, forestry and mining. ATC Connect, We Made It Easy.Arctic Traveler Canada provides you 3 way to access heavy duty HVAC parts look up and cross reference.