Allied Furnace: Limits and switches that are factory set
Limits and switches that are factory set on a Allied furnace: Primary limit, pressure switch and the two flame rollout switches are factory set and should not be adjusted. The primary limit is on the vestibule panel. The pressure switch sits on the cold end header box and proves combustion air inducer operation before ignition. The two rollout switches are manual reset and are on the front of the burner box.
Applies to: Furnace safety controls
How to fix limits and switches that are factory set: step by step
- Do not adjust the primary limit or pressure switch.
- If a rollout switch has opened, check for an exhaust or intake obstruction before pressing its manual reset.
If the unit shows an error code, look it up: Allied Furnace codes
Models
92G1UH92G1UH0450892G1UH0451292G1UH0700892G1UH0701292G1UH0901292G1UH0901692G1UH1101692G1UH1102092G1UH1352095G1UHA93UHA95UH
Source: Allied 92G1UH installation instructions manual, p. 46. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.