Wattage not steady during workout on ERG mode

Bugs and Support
1

Hi,

Current set up is a 2018 Wahoo Kickr Core running Zwift on a Samsung Galaxy tablet. Tablet and Zwift app software is up to date, wahoo app is up to date. 3 sec power smoothing is set to on in both the wahoo app and the zwift app. I did a roll down calibration before the ride, and mid ride.

I’m having an issue I’ve never encountered before over a number of years using Zwift. All of a sudden in workout mode the wattage isn’t holding to the target wattage I’m the workout. It’s jumping around like ERG mode isn’t switched on at all, however the resistance is far less than what I’d expect if ERG mode wasn’t on. So there is some power management on the trainer happening, but it’s erratic and not holding to the target power. It fluctuates anywhere from 20w below up to 40w above.

This is extremely annoying, I’m having to try and juggle the power with cadence and gears during the workout. Any advice would be appreciated, thanks

ETA: I’ve noticed that during the workout on the companion app it keeps flicking from ERG mode to incline. I click ERG mode, it lasts for 3-5 seconds then goes back to incline. I’ve put the tablet right next to the trainer so it’s not a connection/proximity thing. Also the connection is constant for power and cadence from the trainer

2

This is likely to be the cause of the main issue you face. Fix this and the initial problem goes away.

In the first instance id raise a ticket with Zwift and the trainer manufacturer over that erg jumping in & out and see what response you can get - Im doubtful its a setting you can control unless you have multiple devices trying to control the trainer at the same time & they end up fighting over it.

3

I suggest shutting down Zwift and doing an ERG mode workout using the Wahoo app to see if you can replicate the problem. That would put you in a better position to argue with Wahoo about a trainer fault.