Your right... A Good multi meter. The conditions you describe is indeed a
control issue, but most likely not your t-stat. you will need a meter that
will do milli amps. At best you will isolate the fault, see a burnt contact
and say "Oh!". More likely you will narrow the problem down to two possible
issues. At this point you will call atech or change parts. If you have a
$10.00 analoge meter from Sears, it will not do. Happy hunting!

TAB Dude