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Jacuzzi increased electricity usage

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amarone:
We have had a Jacuzzi J-345 for about 8 years.  Last winter it started using considerably more electricity.  Our cover was waterlogged and we read that this can cause a decrease in insulation effectiveness, and therefore an increase in heating costs.  We replaced the cover.  Things seemed to improve, but in hindsight I think the weather just got warmer.  This winter our electricity bills are higher than in summer, when we have three air conditioners going a lot of the time.  Our electric company shows usage data for the last three years and we can see that in January, average usage has increased from low 40s kWh/day in 2013 to about 70 in 2015. 

We can see that the bulk of usage comes in two spikes: 3am to 7am, and 3pm to 8pm.  The filtration/heating mode is set to F1, which means it runs every 12 hours, so that fits with 3am and 3pm. However, it is supposed to run for 30 minutes, not 3 - 4 hours.

The following links show usage in January (top chart) for each of 2013, 2014 and 2015.  The bottom chart in each case shows usage on a day we were out of town.  The hot tub is the only thing we have that would use variable amounts of electricity while we are out (apart from air conditioning, but that does not come on in January).

Does anyone have any idea what our issue could be?  I expect we will call a service technician, but it would nice to be educated first.

Thanks for any help.

2013:  http://i1013.photobucket.com/albums/af252/amarone58/ElectricityJan2013.jpg

2014:  http://i1013.photobucket.com/albums/af252/amarone58/ElectricityJan2014.jpg

2015:  http://i1013.photobucket.com/albums/af252/amarone58/ElectricityJan2015.jpg

Jacuzzi Jim:
 Hard to say what would cause the increase.   Cover for sure but after that to many variables.   As far as the filter cycle on F1 yes it should run pump 1 on low for 30 min twice a day if I remember right.   If it calls for heat the heater comes on.   You might try shutting the power off for 20 min reset the filter cycle and see if it changes anything.    Are you saying that pump 1 runs for 3 or 4 hours on low in the F1 setting? 

amarone:

--- Quote from: Jacuzzi Jim on February 12, 2015, 01:32:07 pm --- Hard to say what would cause the increase.   Cover for sure but after that to many variables.   As far as the filter cycle on F1 yes it should run pump 1 on low for 30 min twice a day if I remember right.   If it calls for heat the heater comes on.   You might try shutting the power off for 20 min reset the filter cycle and see if it changes anything.    Are you saying that pump 1 runs for 3 or 4 hours on low in the F1 setting?

--- End quote ---
I do not know if the pump runs for 3 - 4 hours; I just know that electricity usage is significantly elevated for that length of time. It is particularly noticeable in the 3am - 7am hours.

Jacuzzi Jim:
  Neighbors using it?    ;)

Dr. Spa™ Ret.:
One thing you omit to mention is how the ambient air temps differ from one year to the next.

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