Hi I have a Raypak Pool heater (250) it's old. I turned it on and a steamy burst came out the top for about 5 minutes is this normal? Also I looked at the burner when on and it looks like orange flames like when your bbq burner is about to go. Can I replace this burner? Where can I get the (I live in Ontario) part? also is it worth the cost on a 15 year old heater? thanks to all you experts.