Since we’re talking about power supply, my H3 is plugged into an outlet that is hooked up to the main light switch in the trainer room. Does anyone see any issues with the trainer somedays frequently having the power turned on and off when someone turns the lights on and off upon entering/leaving the room?
My only worry would be that your mains and lights are on the same circuit. Im in the UK and that would be a big no no.
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I complained about experiencing a loud knocking sound earlier in this thread, which went away soon after, nearly a year ago. An update on what’s happened since:
- the loud noise never returned but I did have a softer clicking noise which I didn’t remember experiencing earlier
- Was smelling a burning-rubber smell after harder workouts throughout the late spring and summer. I wasn’t able to isolate this smell to the trainer. My trainer’s up in my attic, which gets pretty hot in the summer, and I had some foam workout mats up there, and also got a new roof in the summer, so I thought either of those things might have just been off-gassing on hot days. Indeed, the smell went away by the fall. I’m still not sure it was the H3… but…
I opened up the trainer and noticed that the belt had shifted outward. There was also a small amount of black particles inside the case, and I think the outer edge of the belt does look a little worn.
I took the tension off the belt and shifted it back, then tightened up the tension to 3/4" (it actually looked more like 13/16" before I reduced the tension). I think it’s a little quieter and smoother now.
Here’s a photo of what my slipped belt looked like. It’s probably mentioned elsewhere in the thread, but the hex screws are 1/8", and have a ton of loctite on them, so don’t try to use your metric allen keys 
I got my replacement washer and it’s the same height (14mm I believe) as the old one. For some reason during reinstall of my old one I had it messed up so when I would tension down the end cap it would bind the freehub. After replacement with this exact same too hat washer it feels better but I think it’s more to do with me installing it right this time. As for the power adapter issues I had the same problem and found that using the right angle power cord was far better. No issues since!
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Anyone else struggling with power readings in this cold snap?
Mine starts off reading over 10% below my P1 pedals, slowly catches up and finishes about 3-4% lower, which is spot on for drive loss.
Really annoying for dual recording in races!
Hey, I am having this issue with my H3. Did you ever find anything out about why this was happening?
Thanks
Why not dual record with the P1? I use my Assioma that way for my zwift+TR rides just pair to Zwift through ANT and TR through BT.
Those power fluctuations are normal, remember these trainers are using optical sensors to estimate power, not a real gauge like a power meter, so they are a bit of a crapshoot
Yeah the plug end that connects into the trainer just isn’t a really tight fit. Once plugged in, just make sure it has some slack so it isn’t being pulled at all. Hasn’t happened to me in a while now.
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Thank you so much. I’ll take a look at the plug and make sure it’s got some slack.
Appreciate it.
I think the loose fit is due to the trainer portion, not the wall plug. If I use the 90* elbow, the plug fit into the trainer is a bit loose, but the wall plug fits firmly into the receiving end of the 90* elbow. Not sure if this is intentional design in case the plug is knocked loose so it can fall out of the trainer easier or just crappy engineering
I just taped the elbow adapter in and plug in to that. Figure if I’m gonna wear out a plug I’d rather it be the disposable adapter piece rather than the hardware on the trainer
I haven’t touched or manipulated the plug into the trainer, only the big block into the wall plug. The trainer will stop picking up power, the green light on the wall plug is still on, but if I unplug and re-plug just that side, it fixes it and I have power again. If it was an issue with the other end, I would assume the problem wouldn’t be fixed with what I’m currently doing.
Thank you for the help
I need both sources to dual record.
If the discrepancy is above 5% you get a DQ in the A cat races.
So I chose to either go with the Saris as primary and P1 as secondary and hope it warms up in time for the critical moments, or go the other way around and try and explain why there is a discrepancy. It’s annoying because often in the warm down it’s about 2%! But can start as high as 15%!
It’s annoying as well that now the top races are specifying the trainer has to be the primary.
I mentioned above about my H3 losing electricity power even though the brick by the wall socket has its green light on. I keep the H3 in the garage which is unheated. Is it at all possible that the cold weather is having an effect on my turbo???
Have you tried what we said about the pins inside the turbo jack?
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I’ve tried what I could without opening the turbo itself. The store has now advised me to buy a replacement power adapter and theyll reimburse me. Let’s see. No word from saris yet… but at least a good response from the store (in London, UK)
Has the side in the machine come loose then?
Did you pry apart the pins (from the outside, no need to open the turbo)
Hi.
The receiving end of the power in the turbo has always seemed too big for the power adapter. I could only see one pin sticking out which I nudged a bit. The turbo lost power again on Monday night and then yesterday would not power up at all. However, the new adapter arrived today and although it is also not as ‘tight’ a fit into the turbo as I would expect, it is delivering power. The guy in the store said that the new transformer I bought is the one that is now shipped with newer H3s. This is the link to it, if anyone else is interested. Note that I won’t trust that its fixed until a few longer sessions of more than 1 hour.
:
If that ‘pin’ in your saris looks like 1 pin the 2 pins have been pushed together.
Look really closely and you will see it’s two pins, gently use a very small flat screwdriver to move them apart.
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