Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Hawthorne, California, holding a 4.1-star rating compiled across 28 customer reviews. The location serves contractors and tradespeople seeking HVAC components, with a physical storefront at 4757 W 118th St in Hawthorne proper. Regular business hours run Monday through Friday from 7:30 AM to 5:00 PM, with abbreviated Saturday availability until 12:30 PM. The shop functions as a distributor rather than an end-user installation contractor, stocking components that professional installers purchase for residential and commercial equipment projects.

The supplier maintains an extensive catalog of HVAC equipment spanning multiple categories visible on their website. Product lines include single-packaged units, split systems, mini-split systems, and variable-capacity systems for residential applications, alongside commercial HVAC equipment. They stock air handlers, evaporator coils, gas furnaces, and oil furnaces from major manufacturers. The storefront offers account services for licensed contractors, including access to contractor tools and the ability to request commercial accounts. This B2B focus distinguishes them from residential service companies, as they supply components rather than perform end-user installations.

Customer experiences documented in reviews reveal a mixed service record. One reviewer, Dennis Jimenez, described successfully diagnosing and resolving a wall heater ignition issue by identifying a faulty inlet valve as the culprit. Another customer, MISHA G, reported a helpful and professional phone inquiry experience. However, multiple negative reviews cite problems with return policies, motor reliability issues on purchased components, and customer service concerns where staff treated shoppers dismissively. The pattern suggests quality control on certain components may vary, and customers report inconsistent experiences with warranty and return processes.