Howdy:
Relative newcomer to heating problems, however I hooked up a herbal gas Williams 2000Btu direct-vent furnace in an outside interest greenhouse four years in the past that has been operating terrific till this week. I found out it wasn’t operating simply as a chilly the front is shifting in and dangerous all our tropical trees! It were operating remaining week, so I realize it has fired up ok this fall. Went in and determined that the pilot mild became out.

Tried to mild the pilot numerous instances with out a success–once I maintain down the pilot and mild it, it lighting fixtures simply fine, pleasant blue flame, proper subsequent to the pilot generator, however refuses to live lit once I launch the pilot on/off knob, notwithstanding a couple of tries and protecting it down for numerous mins to warmness the thermo couple/pilot generator. williams heating products

Did a few reading and did some things:

  • Blew out the pilot tubing, with compressed air, which regarded to be clean.
  • Removed the pilot generator/pilot meeting and wiped clean it.
  • Checked the pilot generator directly (disconnected from everything). With a flame it generates as much as 400mV.
  • Reconnected the pilot generator to the gas valve terminals and attempted to degree a voltage there with flame–nothing, notwithstanding getting it quite hot. Measures no voltage, irrespective of how I set the thermostat (all of the manner on, all of the manner off).
  • Tried disconnecting the thermostat and lights the pilot (to check for a grounded thermostat lead, in line with the guide) and it nonetheless might not live lit. Checking the voltage on the pilot generator terminals all through this method nonetheless confirmed no milivolts on my meter.

Not positive why the pilot generator will generate rate whilst disconnected, however disappears once I join it to the terminals–I realize it’s stressed out properly, because it became stressed out before (and as in line with the set up guide). I recognize that the guide states that I ought to get 140mV with the thermostat contacts closed (in line with the guide) on the valve terminals with the pilot lit, however nowhere can I get specifications on what the real generator ought to be placing out un-connected (I’m getting 400mV with the pilot going, however for all I realize it’s pre- purported to placed out 4000mV?). I have no type of schematics at the gas valve to recognize what type of load is in there, etc.  williams vent safety switch

The unit is in a greenhouse, so it receives wet, has a few corrosion, however in reality now no longer rusted, and the fueloline valve is quite tons pristine because it’s quite nicely protected. The pilot generator became a bit corroded, however seems quite top after only a easy cleaning.

The manner I determine it, both my pilot generator is weak/going terrible and I want to update it, or my whole fueloline valve wishes to get replaced because of a few type of fault/short (a far greater pricey hassle). Any mind on how I can higher decide wherein the hassle is lurking? I can ship photos if needed.