Amana AMVM970803BN Error Code E17: Supply Air Temperature Sensor Open (External)
What Does Code E17 Mean?
Code E17 on the Amana AMVM970803BN means the external supply air temperature sensor circuit is open. The temperature reading from this sensor will not appear in the CoolCloud HVAC App, but the furnace itself continues to operate and heat your home — this is a monitoring fault, not a shutdown.
The AMVM970803BN uses these temperature sensors to feed the CoolCloud app comfort and diagnostic features rather than to run basic heating. An open supply-air circuit usually means the probe is not fully plugged in, the connector is poorly crimped, or the probe has failed (about 10k ohms at 77°F is expected). Only the supply-air reading is lost; heating is unaffected.
This code belongs to the temperature-sensor family on this board: E15/E16 are the external return-air sensor (open/short), E17/E18 are the external supply-air sensor (open/short), and E19/E1A are the onboard return-air sensor (unplugged/short). They are grouped together because each simply removes one temperature reading from the app while heating continues.
What You'll Notice
- The furnace heats normally but the supply-air temperature is blank in the CoolCloud app
- The display shows E17
- The fault may follow recent service near the sensor
- No change in heating performance
Common Causes
How This Is Diagnosed
A technician confirms the external supply-air sensor probe is fully seated with a properly crimped connector, then measures its resistance against the expected roughly 10k ohms at 77°F. A failed probe is replaced.
If wiring and probe are good, the PCB connection is checked. The furnace keeps heating because this sensor only feeds the CoolCloud app.
When to Call a Professional
This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:
- The supply-air reading stays missing in the CoolCloud app after a power cycle
- You want the CoolCloud comfort and diagnostic data restored
- E17 appears with other sensor codes pointing to a wiring issue
Frequently Asked Questions
Does E17 affect how well my furnace heats?
No. It only removes the supply-air reading from the CoolCloud app. The furnace continues to run and heat normally.
What does the supply-air sensor do?
It reports the temperature of the heated air leaving the furnace to the CoolCloud app for monitoring. Losing it does not stop heating, but the app loses that data point.
✓ Verified against manufacturer service manual — March 2026