Allied Furnace: Electrical checks on the furnace
Electrical checks on the furnace on a Allied furnace: A basic electrical checkout on the Allied furnace is quick and catches a lot. You are looking for loose connections, low supply voltage and a blower motor that pulls more current than its nameplate says. Do the wiring check with the power off, then the live readings with the furnace running.
Applies to: Furnace electrical checkout
Common causes of electrical checks on the furnace
- Loose or burnt wire connection
- Supply voltage outside 120 VAC plus or minus 10%
- Blower motor drawing more amps than its nameplate, from a failing motor or restricted airflow
How to fix electrical checks on the furnace: step by step
- Turn off power and check all wiring for loose connections.
- Restore power and run the furnace.
- Check supply voltage at the furnace. Correct voltage is 120 VAC ±10%.
- With the blower access panel in place, check blower motor amp draw with a clamp meter and compare it with the motor nameplate.
- If a reading is off, find the cause before leaving, and call a licensed technician for anything inside the line voltage wiring you are not comfortable with.
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.