Fluctuating Coil Resistance on Mod + Sub-Ohm Tank

[Exbrill]

Hi everyone,
I’m a new vaper and noticed inconsistent resistance readings (0.15Ω-0.28Ω) on my setup with a 0.2Ω prebuilt coil. Tried:
• Cleaning 510 connections thoroughly
• Reseating the coil multiple times
• Testing on another mod (same fluctuation)

No leaks or visible damage. Using 70/30 VG/PG juice at 65W. Occasionally get "Check Atomizer" errors.

I’ve read that minor resistance shifts (0.1-0.2Ω) might be normal, but my fluctuations are larger. Could it be related to:

• Loose post screws in the tank?
• Metal debris in the 510 thread?
• Coil material (e.g., specific wire types causing temp-based changes)?

Any advice on further steps? Thanks for your patience!

 

[MD_Boater]

I just replaced a 6 year old mod for the exact same reason. My tank had a .15Ω coil in it and every few hours it would jump to over .25Ω and I'd get a burnt hit. It also started reading too low occasionally causing an "Atomizer Short" error. I tried everything to fix it. Finally gave in and switched to a new mod 2 days ago. I'm still using the same coil as I was with the old mod, and it has been holding rock solid at .15Ω in the new one.

I think you're spot on with the metal debris in the 510 thread, although as a "new vaper" you probably haven't screwed the tank on and off as many times as I did on my 6 year old mod. I think that it is jut wreaking havoc on the mod's ability to read the coil resistance.

I can't complain about the mod. It was a Smok Scar-18 that served me well for a very long time.

 

[VapeOn1960]

More details... which mod/tank and which coil? Do you pause between vapes (lets the coil cool off) or "chain vape"? Feel the tank... is it getting hot? Most likely it's other issues (as mentioned) but best to consider all possible causes. Anyway, I have a mod that has issues with 510 connection on some tanks (center pin is shorter) Sometimes the center pin on the mod doesn't "spring back" all the way and ohm readings can be erratic (or just say "no atomizer") Hope this helps.

 

[Wb80]

Why i am all mechanical rda vaping. Js