Allied Furnace: Preventing exhaust icing in extreme cold
Preventing exhaust icing in extreme cold on a Allied furnace: Long vent runs through unconditioned space can form ice at the termination below about 20 F (6.7 C) and stop the unit from running.
Applies to: Exhaust terminations in cold climates
How to fix preventing exhaust icing in extreme cold: step by step
- Make sure run times are at least 5 minutes, which clears most icing problems.
- If icing persists, install heating cable on the exhaust piping and termination. Heating cable kits are available; check the unit spec sheet for part numbers.
If the unit shows an error code, look it up: Allied Furnace codes
Models
92G1UH92G1UH0450892G1UH0451292G1UH0700892G1UH0701292G1UH0901292G1UH0901692G1UH1101692G1UH1102092G1UH1352095G1UHA93UHA95UH
Source: Allied 92G1UH installation instructions manual, p. 27. 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.