Hello Everyone. I'm new to the site and need your IQ help. I have a Raypack 407 and have developed an issue. It will go through the CFH and SPRK fine light up and runs for about 5-10 seconds. Shuts off and repeats. It will do this all day long it I let it. I use it every day for the last 8 years. Replaced the fan about a year ago which is working fine still. Any suggestions would be appreciated.