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Caldera Vacanza 2015 not heating (cpanel works, pumps work, Start blinks, no err

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3dron:
I am getting no heating but all the cleaning timer functions keep running fine. 

Pumps run at all range settings from circulate to full.

I have checking if filter blocked/dirty/greasy.  Even tested without filter.

I have powered off for 1 minute and turned breaker back on.

On power on no error codes, it just comes up to full menu with START blinking.

I have Ohm tested both Heat Sensor and Hi Limit with Ohm meter set to 20k

Temperature sensor (wire feeds under tub) reading is 1 without movement.  
Is this reading broken or just because the sensor is touching such cold water? 
I read 0 would be cracked/ broken (cpanel read 50°)

Hi Limit sensor which I can see is attached to metal pipe right below control panel reads 11.83

I jumped the heat sensor cboard pins, powered back on and it reads 115° on cpanel but START still blinks.  I tried running through the pump levels and clean setting shortly.  But it still blinks START.

At this point I just unjumped.  Should I still let it run jumped to see if the water heats?  Or should the START stop blinking immediately if the sensor was an issues?

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