Will have to return when tech support is open. Attempted to call and they were closed it is a phantom boiler made by velocity boiler works. Flame comes on for 5 seconds and fires up. It keeps repeating cycle over and over without any error codes. I checked LP pressure, pressure was normal. Customer has propane in both tanks. Removed flame sensor and igniters, both were dirty, I cleaned them off and flame ran for maybe 2 seconds longer but still kicks off after 5 seconds and repeats cycle. Does not shut down after a certain amount of attempts to produce a lock out code. We will have to return when tech support is open.