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Chinese hot tub won’t heat - no error code


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Hi,

We’ve had a Chinese hot tub for 8 years and had a few odd problems but always sorted them. For example last year the circulation pump got very noisy so bought a new one (fitted by an electrician friend) and that solved that!

But the tub had started to be very slow to heat up (and sometimes not at all or only to a certain temp) and I noticed that one of the flow type heaters had a light on (it’s has two). So after last summer we drained it and have just replaced the old (and very worn out) heater.

It’s been filled, checked for air locks, etc etc but it’s not heating at all. I’ve always been able to figure these things out but it’s got me stumped. No error code either. Sounds like it’s running and trying to heat but not doing anything.

Hopeful someone here will have some wise ideas or at least a way to figure out what the problem may be!

Thank you in advance!

Fiona

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