i have a 220v tiger spa that the heat quit working,i replaced the heater with no luck i checked the voltage,i discovered only 1 leg of my 220 is hot going to my heater whats next?

What year is it? What is the voltage if you check between the terminals that the heater hooks up to?

its a 01 tiger spa sumatran, voltage from black to white; 22.0v,black to ground 2.50v,white to ground 120.0v,i also checked ohms to thermisters 8.32ohms...

Make sure the "heater on" led is lit up in the control box

If the led is on and you don't have 220 volts coming from the heater relay then you need a new heater board.

yes the led heater light is on........

Sounds like the heater board, which is the whole left side board. Look at the relays were the heater wires connect and look for black burn marks around them.

I have a similar problem (I believe it's fairly common). One of the Omron G8P-1A4P-V relays in the control box PCB has burnt out. The only source I can find for replacement relays is onlinecomponents.com. Although the relay is cheap ($2.24), there is a minimum order of $35 which means I will have to buy 16 of them. Any ideas on how to "dispose" of the rest?

This still seems to be the cheapest way to go since I was quoted $4xx for a replacement control box.

i took the advice of dan the spa man and looked at the back of the heater board, it was burnt to crisp, thanks dan