no heat have b1342 dtc

costaexpress

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i have a 03 ls with no heat found a code b1342, b2426 and b2796

hooked to looked on alldata and it says replace datc no test for it....mydatc will not test push both off and defrost and nothing happens when i push off within 2 seconds like it says... suspect a bad datc

help please
 
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