The Nordyne M1MA 070A AW is a 70,000 BTU upflow gas furnace from Nordyne’s M-series residential line. In Nordyne’s naming system, M1MA identifies the upflow M-series platform, 070A indicates 70,000 BTU input capacity and A-series production, and AW identifies the cabinet color variant. Service parts for the M1MA 070A AW and M1MA 070A BW are largely shared, with the suffix primarily affecting cabinet color rather than service components. Repair Clinic stocks genuine Nordyne OEM parts for the M1MA 070A AW. Browse the Nordyne furnace parts catalog filtered by M1MA 070A AW for the complete parts inventory.
Nordyne M1MA 070A AW Platform: Decoding the Model Number for Accurate Service
The M1MA prefix places this furnace in Nordyne’s upflow M-series, distinct from the M1MB and M3RL variants on the same family. At 70,000 BTU the M1MA 070A AW is sized for mid-sized residential applications and uses components that differ from the M1MA 098 or M1MA 045 BTU variants. The igniter, flame sensor, and control board are the most commonly replaced components on the M1MA platform, and all three should be tested using the control board LED fault code before any part is ordered. The Nordyne furnace troubleshooting guide covers the fault code blink system for the M1MA control board.
Most Replaced Parts on the Nordyne M1MA 070A AW
M1MA 070A AW Igniter
The M1MA 070A AW igniter must heat to temperature within the control board timing window to trigger gas valve activation. Testing resistance across the igniter terminals at room temperature with power off confirms or rules out igniter failure in under two minutes. Handle the element only by its ceramic base during installation to avoid thermal hot spots from skin oils.
Flame Sensor Rod for the M1MA 070A AW
The M1MA 070A AW flame sensor passes a micro-amp signal through the burner flame to confirm sustained combustion. A furnace that ignites and shuts off within two to five seconds of combustion, then repeats before locking out, is showing the flame sensor symptom with high specificity. Annual light cleaning with fine steel wool extends sensor service life on the M1MA platform.
M1MA 070A AW Control Board
The M1MA 070A AW control board manages ignition sequencing, blower delay, and safety switch monitoring. Read and document the LED blink code before ordering any replacement. The blink code identifies the specific failed component in most M1MA service calls, pointing to the igniter or flame sensor far more often than to the board itself.
Draft Inducer Motor Assembly
The inducer on the M1MA 070A AW is sized for 70,000 BTU combustion gas throughput. Bearing failure presents as grinding or squealing during the pre-purge phase at the start of each heating cycle. An inducer that is audible but still functional should be scheduled for replacement before bearing seizure causes a heating emergency.
Blower Motor and Run Capacitor
The M1MA 070A AW blower motor circulates heated air through the home’s duct system. A motor exhibiting slow-start or reduced-speed symptoms should have its run capacitor tested first. A capacitor outside its rated microfarad range causes the same symptoms as a motor winding fault at a fraction of the replacement cost.
Nordyne M1MA 070A AW Parts at Repair Clinic
- Genuine Nordyne OEM parts for the M1MA 070A AW and M1MA 070A BW variants — Nordyne furnace parts catalog
- M1MA platform fault code blink charts and wiring diagrams available alongside every part listing
- Parts for the full Nordyne M1MA and M1MB upflow line available from the same catalog
- 365-day returns on uninstalled parts with no restocking fees
Nordyne M1MA 070A AW Furnace Parts FAQ
What is the difference between the Nordyne M1MA 070A AW and M1MA 070A BW?
The AW and BW suffixes on the M1MA 070A model number indicate variant distinctions such as cabinet color or minor component specifications. Most service parts including the igniter, flame sensor, and control board are shared between AW and BW variants on the M1MA 070A platform.
What BTU output does the Nordyne M1MA 070A AW furnace produce?
The M1MA 070A AW delivers 70,000 BTU input capacity. The M1MA designation identifies an upflow gas furnace in Nordyne’s M-series residential line, with 070A indicating 70,000 BTU input and A-series production.
My M1MA 070A AW furnace attempts ignition but fails to produce heat. What should I check first?
Start by reading the control board LED fault code. A three-blink ignition failure code points to the igniter in most cases. Test the igniter resistance at room temperature with power off. Infinite resistance confirms a failed igniter. If the igniter tests good, check the flame sensor.
How do I find the M1MA 070A AW parts diagram?
Parts diagrams for the M1MA 070A AW are available on the Nordyne M1MA 070A AW product page at Repair Clinic under the Diagrams tab, organized by assembly section to help identify the correct component.
