Johnstone Supply

Johnstone Supply in Avondale, Arizona, operates as a wholesale distributor serving licensed HVAC contractors across the Phoenix metro area, with particular reach into the West Valley. With a 4.3-star rating compiled from 32 customer reviews, the store stocks heating and cooling equipment ranging from residential split systems to commercial packaged units and manufactured-housing products. The Avondale branch runs Monday through Friday from 7 AM to 5 PM, closing on weekends, and functions as a trade-only supplier rather than a retail walk-in location. This is a business built for professionals who need reliable access to parts and equipment to keep their own operational, not a homeowner's one-stop emergency shop.

The store carries a broad equipment lineup including split systems, single-packaged units, furnace coils, and variable-capacity systems, positioning it as a one-call source for contractors tackling both residential replacements and light commercial installations. Field-installed accessories, multi-zone systems, and extended-warranty options are also catalogued, giving installing contractors a single vendor for projects that might otherwise require multiple supply stops. The breadth of categories means technicians can pull from a single wholesale account rather than piecing together orders from specialty distributors. Extended warranty coverage on residential unitary equipment adds a layer of post-sale support that helps contractors present complete proposals to their own .

The technicians who staff the Avondale counter, including Blair, Rick, Mike, and Jose, draw repeated commendations from fellow tradespeople for their product knowledge and willingness to help find the right part for unusual jobs. One reviewer described Mike as consistently eager to assist and mentioned plans to bring him lunch, a small gesture that reflects the rapport built through regular counter visits. During a June 2017 heat wave when Phoenix set record temperatures above 120 degrees, reviewers described making urgent runs to the store for capacitors while their home AC systems failed, indicating the team remained accessible to contractors during high-demand periods. Several 5-star reviews specifically name these staff members as reasons they return to the Avondale branch rather than driving to competing distributors.