Our 60 page booklet is a layman’s guide to motor coach air conditioning. There are no big words, scientific explanations or lawyer-speak terms to contend with. It will help you to understand how air conditioning works, and what you can do to maintain yours without spending a fortune at every service stop. $25. including postage, easiest to just use paypal, or call and use Credit Card.


Click here to purchase AC Booklet via Paypal

Both Compressors, and Clutches can be purchased by phone: 770-474-1150.

Re-manufactured, hermetic compressors, such as those used on many motor coaches, are built to factory specifications with both OEM components, as well as other components that meet or exceed OEM requirements. As a standard, these compressors come with a limited 1 year warranty. We have most compressors in stock ready for immediate shipment.  Every compressor is checked, in detail, to insure good cooling and long life. We provide packing, shipping & return shipping for your core compressor.

We also offer many other compressors. Call us with your details, and we will gladly assist you with finding the right part for your application, or if you already have a part number, feel free to visit the online store. We have most part numbers available.

Compressors for SETRA and other coaches are available, call our office.



Our OEM quality clutch assemblies are manufactured in the U.S., by the most respected manufacturer of electric clutches.

Hub Mount style clutches start at $675.00.


The absolute best deal on the clutch, is the clutch kit, which includes the clutch plate, the pulley with bearing, and the clutch coil. However, we also offer all the components of the kit separately.


Looking for an A/C part for your motorcoach, give us a call.  We offer  many additional parts for the A/C of your motorcoach. We have hoses in stock for MCI and Prevost coaches.  We offer some hoses for the Setra coach. Call for pricing.

     Just a few of our A/C parts:

Valve Set  – 05G -all 3 heads            $250.00        Compressor Hi Side Service Valve    $  95.00

O5G Hub                                                  95.00            Compressor Lo Side Service Valve      150.00

O5G Hub Nut                                         45.00            Compressor Hub Mount Seal                 115.00

Manual Pressure Unloaders    230.00 each      Compressor Gaskets                                     Call

Pressure Switches, Lo, Hi            30.00 each     Alco Expansion Valves                                85.00

Condenser Pressure Switch        95.00  R134    Sporlan Type Expansion Valves              85.00                                                               145.00  R22

RADIATORS and air coolers now available for Most Coaches – Call for Prices
Call today and let us quote you on a radiator and/or air cooler for your coach.
We will save you money!
One thing is for certain: Your coach will not run with a bad radiator. Don’t wait until you’re called with a broke down coach. We can provide you with a new quality radiator complete for less than you would expect. Call with your VIN number and let us price it!

WelchIndustries provides parts and services for your coach needs.  Also feel free to give us a call. Thank you for visiting Welch Industries.

Condenser Coils – Finest! Copper Coils, Aluminum Fins

All Condesnser Coils can be purchased by calling us directly:  770-474-1150

First Quality Condenser Coils are manufactured by a world renowned coil manufacturer with copper tubes and aluminum fins. This is the best combination for excellent cooling, at a reasonable cost.

Welch Industries Condenser Coils are manufactured to exact bolt-in replacement tolerances, and are guaranteed to fit exactly as factory-new coils. Coils are available to fit many MCI and Prevost Coaches. Other coaches in progress. Please call for availability.

MCI 5,7,8,9 Condenser Coil  –  $1025.00 plus shipping (Out of Stock)  (MCI Part # 16B-4-1)

MCI 96 & 102 Condenser Coil  –  $1725.00 plus shipping   (MCI Part # 16J-4-1)

MCI E & J Model   –   $1825.00 plus shipping

  • (MCI Part # 16-04-1002 – E Model – 1999 and earlier)
  • (MCI Part # 16-04-1261 – E & J Models – 2003 & newer)
  • (MCI Part # 16-04-1279 – J Model with receiver tank)

Prevost XL45  –  $1775.00 plus shipping

Prevost XL45 – Entertainer – $1525. plus shipping

Prevost  H3-40-45 –  $1875.00 plus shipping

VanHool ‘T’ Model – $2750.00 plus shipping

VanHool ‘C’ Model – $2850. plus shipping

SPECIAL NOTE: – On some “J” coaches, the A/C system was designed with no receiver tank. If your condenser needs to be replaced, we can install a NEW CONDENSER COIL, and install new receiver tank with 2 sight glasses. The unit is, then, much easier to service upon completion of the installation with the custom receiver tank/condenser coil assembly. Remove your condenser assembly, ship to us and we’ll ship it back to you, ready to install. Total cost including shipping to us and return to you Is $4500.   Of course we do all the work here at our facility as well, so we would love to have you bring your coach in!


MCI 102 A, C, D & DL Condenser Coil

VanHool ‘T’ Model Condenser Coil


Prevost H3-45 Condenser Coil

Auxiliary A/C Systems

We can fine-tune your car

Welch Industries Auxiliary Air Conditioning systems have proven themselves now for many years, providing additional cooling to enhance the comfort and utility of coaches from early 60’s into the 90’s, and now  into as late as 2010 models, in large and small fleets.

Auxiliary AC systems provide maximum comfort.  Designed as bolt-in accessories for most coaches, they are considered by many to be a necessity for comfort and utility.  Units are totally independent of the main AC system, so that it becomes an excellent back-up unit in case of main system failure.  Often it is possible to continue a trip without interruption even after the main system has failed.

Complete instructions are included with each unit, and the average technician can install successfully using ordinary shop tools and equipment.  A working knowledge of AC systems is needed.  Telephone support is available as needed.  Units are shipped complete with all hoses, electrical connections needed, and are tailored to fit the particular coach ordered for. Modifications will be made to your specifications for conversions, special coaches, etc.

The RE-1 Auxiliary evaporator unit is ideal for many coaches including D & DL model MCI’s.  It has an integral air filter, and does a great job of helping to cool your coach.

Eagle – RE-1 – 6 or 8 volt – Unit Only Price $2,325.00  —  Unit & Installation Price $3,950.00

MCI 5,6,7,8, Early 9’s – RE-1 – Unit Price$2,600.00 — Unit & Installation Price $3,950.00

MCI D’s, DL’s – RE-1 – Unit Price $2,600.00 — Unit & Installation Price $3,950.00

MCI E Models – Unit Price $2,700.00 — Unit & Installation Price $4,200.00 to $4,450

                                                                                                                                  call for specific price

Prevost LeMirage w/ S-60 or 8V92 Engines – RE-1 – Unit $ 2,700.00 — Installed  $3,990.00

Prevost H345 – RE-1 – Unit $2,700.00  —   Unit & Installation Price $3,990.00

Setra – RE1 – Unit Price $2,850.00  —  Unit & Installation Price $3,990.00

VanHool – RE1 – Unit Price $2,850.00  — Unit & Installation Price $3,990.00

wp0996c3fe_05_06 RE-1 Ausiliary Unit For Most Coaches

We typically have a few options here. We are not necessarily a Coach Sales Dealer, but the nature of the business sometimes will bring us opportunity to help someone sell or buy a Coach. If you are in need of a Coach, we will do our best to get you headed in the right direction! If you are new to the industry, we will help you understand your need, and will do our best to align that need with some Coaches to be on the look out for. We have many partners in business, and many of them offer a diverse selection of Coaches for sale. There is also a bi-monthly publication you should check out, frontlinebuses.com. Inside, you’ll find many leads, and many different Coaches and buses for sale, as well as other services that may help you.