Hasn't been too bad. Changed the water out this past weekend. Cleaned the tub. Filled it back up. It took forever for it to heat back up. It slowly climbed back up to 101 where we keep it in the summer. It took like 36 hours to go from 80 to 101. Read on internet that the heating coil was probably out. Had a hard time believing this but I noticed in the user manual that it has a safety feature that shuts the heater down first if the temp gets too high and then the pumps if it continues to climb from friction in the system so that suggested to me that the water could heat up slowly even without a heater.
So I decided to make sure the heater was getting power and my trusty multi-meter told me it was getting 220V as it should. I then disconnected the leads and checked for resistance and it showed an open circuit which indicates a bad element. I then hooked it back up and checked for amp draw on both legs of the element and got very little amp draw, like .2 amps. I checked the amp draw on the mains to the hot tub just to verify my meter was working and it showed about 6 amps on each leg.
So.... Can the friction in the system heat the water? Is my element bad? Thoughts.