U S Stove 6039 help??

hello all,
I am a newbie to this site, and a 3 stove owner over the last 8 years(1 harman, 1 us,1 lopi). currentlly have a USS 6039, and have been getting a err 2 message for quit some time. the way the stove would run and get the message would be, get flame going, 20-30 minutes, (not produce good heat) and then the stove would shut off. i have called support 9 times and yes the did answer me. i am a clean freak and clean the stove when it runs normally bi weekly. support stated to me that the stove is dirty, and had me run all the test on circuit borads etc. the out come was #1 the stove is dirty, #2 the low pressure switch is bad. i conducted the test on the low pressure switch,(bypassing with auto fuse) and the stove runs like a top. called support to order new low pressure switch, told them what i had done to the stove, and they stated that while bypassing the switch and the stove worked well doesnt mean that the switch is bad.... so now i am confused as hell and need some advice. at this current time, swtich is by passed and runs awesome.. fyi stove is 2009 and only burned less than 8 tons through it please advice

all exhaust and entire stove hit with shop vac

door gasket replaced last week, how do i upload a photo??

If these switches raley fail, and i have diassembled and cleaned all parts of stove 6 times. what else could it be???

wish i would have found this site 2 weeks ago. this morning i conducted some type of leaf blower trick. stihl br 600 back pack blower, blew through the air intake and blew all the debris out through the exhaust, stove has been running good for 4 hours as of know, hope it stays that way. question, like i stated i have a new low pressure switch currentlly in the mail, do i send i back or just keep it???? thoughts