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The Goodman 0130F00038 Auxiliary Limit Switch is a genuine OEM thermal safety control engineered for ACVC800805CXAA two-stage variable-speed gas furnaces and other compatible Goodman/Amana models. The light-blue housing identifies its factory-set temperature rating, so you install the exact cutoff point the equipment was designed around — no guesswork, no nuisance trips.
This auxiliary limit monitors heat-exchanger and blower-compartment temperatures and opens the control circuit if conditions exceed safe limits, protecting the furnace from overheating caused by restricted airflow, a failing blower, or a dirty filter.
Our OEM switch matches the original trip temperature, terminal spacing, and mounting bracket exactly — critical for a safety component. A generic universal limit may save a few dollars but can carry a different cutoff temperature, risking short-cycling or, worse, failure to trip. For a part that protects against overheating, OEM is the smart choice.
Rated 2/5. With the furnace fully de-energized, a homeowner-level DIYer can swap this switch in 15–20 minutes using a nut driver and the two spade connectors. If you are unsure which limit has failed, we recommend a licensed HVAC technician confirm the diagnosis.