2003 Ultimate Freedom Heater blowers inop.

[huey77]

I have a 2003 Winnebago Ultimate Freedom That has 5 small heater cores and fans(3in front and2 in bedroom) on Hurricane hot water heater system. I'm pretty sure I'm operating this correctly but none of the fans come on. The toggle switch with green light for power comes on but no fan high or low. I found a relay outside with the fuses that said heater blower and swapped it but no help. Ant help would be great