Featuring the industry-standard Erie PopTop design

including Heil and Quaker models such as CAE091HAA

ECM condenser motor troubleshooting often centers on the control module

This is a dedicated 24VAC motor

or a failing blower motor before determining if the HVAC high limit switch itself is faulty

Aaon ASM01895 Modular Service Tool THPU32HP7Y Featuring the industry-standard Erie PopTopThe AAON ASM01895 Modular Service Tool SD Operator Interface is a critical diagnostic and configuration handheld device for AAON HVAC controls. Engineered for precision, this OEM HVAC service tool is identical to part numbers OE391 12 and V28140, offering a universal solution for technicians managing modular controllers. Featuring a durable black enclosure with a 4 line by 20 character adjustable contrast display, it ensures high visibility in