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Hi, I'm Tim and I'm an HVAC expert here to assist you with your questions. Please provide all information I request as it makes it more difficult to troubleshoot something when I'm not there onsite. Essentially, you become my eyes and ears. Thanks for the opportunity to help. At the end of our dialog, you will have a chance to rate my service, but please wait until we are finished and you're satisfied you have all the information you need.
What is this on? Make and model please? What exactly happens to the burners when it malfunctions?
Does this unit have a flame sensor and hot surface ignitor or a spark ignition? In other words, what is the full model of the Modine heater?
Does your pilot ignitor look like this?
OK, let me know. What is happening here is your pilot is not sensing the pilot flame which is why the unit (and control) keeps restarting until it locks out.