Originally Posted by
ozon depletor
hello everyone this is my first entry using this service. my question is in dealing with gas fireplaces. i have been in the hvac field 18 yers now but never serviced gas fireplaces. i am having a problem with a robertshaw/grayson gas valve model# 7000mvrlc serial#711-701-417. this is the second valve that i have installed along with a new thermopile. with both valves they worked for 24-48 hours then the main burner will not ignite. although i think i understand the sequence of operation can anyone explain it to me and give me some trouble shooting tips before the homeowner loses his patience. thanks in advance