The set valve might not check it right after but it will eventually try again. Most likely at the next cold startpeople people people, I did fit a full zard system on the weekend and without modifying the servo at all I have no error codes!!! The trick is to remove the cable from the flapper side with out turning the pulley on the servo at all!!! You will not get any error codes at all. I did it and it works. I was told this info by my zard dealer and to my disbelief it worked.