I have the about mentioned stove with the LP conversion. I bought it used about a year ago and it worked great until now. When I try to light it, the pilot light is week at best and only stays lit when I hold down the button. I replace the thermocoupler and still nothing. If I lightly tap in the second/ larger valve cover on the valve body with a wrench it sometimes will light. I talked with a local distributor about it and he suggest replacing the valve body, $160! Any input would be greatly appreciatted.