Getting an E05 error code when trying to startup my spa heater. I've been using it throughout the year about once a month with no problem and now I'm not getting no glow or click of the gas trying to send it to the burners. I've looked through the other posts on here and it sounds like I may need to replace the ignitor? When the heater is cycling through startup, that should get 120/240 volts supplied to it everything is working properly? It's been slow to startup before if I haven't used it in months, but I haven't got an error code like this in a couple of years, the time before it was because I ran out of propane?