Allied Furnace: Check temperature rise and adjust blower speed
Check temperature rise and adjust blower speed on a Allied furnace: Temp rise check on the Allied. Run it until supply and return temps settle, then measure. Out of range means a speed change.
Applies to: Heating airflow adjustment
Common causes of check temperature rise and adjust blower speed
- Temperature rise outside the nameplate range can cause erratic limit operation
- Blower speed set too low, giving a high rise
- Dirty filter or restricted ductwork
How to fix check temperature rise and adjust blower speed: step by step
- Run the furnace until supply and return air temperatures stabilize.
- Measure the temperature rise, supply minus return.
- Compare it to the range on the unit nameplate.
- If it is outside the range, change the blower speed.
- Raise blower speed to lower the temperature rise.
- Lower blower speed to raise the temperature rise.
- Recheck the temperature rise after each change.
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.