How was your device detected?
Enabled Sense Labs, and was alerted that a device was stalling immediately upon activation of the feature (by looking at it in the app).
What device has a potential issue?
Outdoor AC Heat Pump (Phoenix, AZ)
- Manufacturer: Goodman
- Model: SSZ140481AG
- Age: ~8 years old, original hardware and original start/run capacitor
- Typical running usage: ~3,400W
Screenshots from Sense Labs: Motor Stall
Stalls detected per day from Labs:
Note: I installed my Sense on 6/6/20, so stalls were almost certainly already occurring (unknown to me!)
Final detected stall from Labs (prior to start/run capacitor replacement):
Peak Value: 21,595 W
Motor Stall from Power Meter (prior to start/run capacitor replacement):
Removed original capacitor
Herm Capacitance: (IS): 17.2 uF (S/B): 45 uF
Fan Capacitance: (IS): 996 nF (S/B): 5 uF
Replaced with new capacitor with Genteq unit from Amazon, on 6/29/20
Values matched stated 45uf/5uf
Power Meter Trace of first startup immediately after replacement:
Notes: The +1203w step was the electric oven which was on at the same time, so 1203w would be the baseline for the Heat Pump startup. The HVAC tag is in the inside air handler starting up ~5 second later.
Power Meter Trace from recent (7/10/20) Heat Pump + Air Handler Startup
Notes: Still showing similar profile.
Definitely appreciate the feature, as it’s likely saved us from additional repairs in the near future! Given that the heat pump has probably been stalling for awhile without my awareness, some damage is probably already done though.
My only complaint is that now Sense has to re-learn to reliably detect my heat pump, but confident it’ll get there! It’s been extremely successful at detecting devices at my house, with 10 devices (primarily major appliances and a few lights) detected since install on 6/6/20.