2004 Caldera No Heat

[Acefryman6]

I have a 2004 Caldera Aspire. I am having a issue with heating. Everything else works great ie: pumps, blower, lights exc. Just will not heat at all. I have replaced main control board, Heater relay board, pressure switch, and temp switch. I am at a loss still getting no heat. Temp light just flashes on the control panel. It does not light up on the board to say it is heating. Please help. 

[cranbiz]

Check the heater element. With an ohm meter, check the resistance of the heater. It should be between 12-18 ohms.

You can also check that the heater is getting voltage when the tub is calling for heat. There should be 220V across the 2 heater terminals. (assuming you have a 220V tub)

[Cusser]

23 hours ago, cranbiz said:

Check the heater element. With an ohm meter, check the resistance of the heater. It should be between 12-18 ohms.

You can also check that the heater is getting voltage when the tub is calling for heat. There should be 220V across the 2 heater terminals. (assuming you have a 220V tub)

Above is GREAT advice, pretty universal too.

I have a 1988 CalSpa which fortunately utilizes same 240 VAC elements as a home electric water heater, so inexpensive for me to replace the element when it goes bad.  I've replaced the element in mine every few years, and I agree with cranbiz' troubleshooting advice.

 

[RDspaguy]

There are 3 led lights on the board, which are lit?