Heated grips

[Pro S]

Hi guys. I have a 2017 Switchback Pro S 800. The heated grips seem to not work very well. Not much heat almost seems as though the heat comes and goes. They don't start to get warm until sixteen or seventeen miles into the trip. The grips used to get so long. I could never run them on high, now and I setting this very little heat. Has anyone ran into this issue before?
Thanks

 

[MrSled]

I would find out the resistance from a good set from a friend or a donor sled and check it. Most likely the element is breaking up under the grips.