If we have any experts in natural gas garage heaters Iíd appreciate assistance in trouble shooting.
Itís a 22 year old Hamilton WGH 30-45 series model.
Last year I walked into garage and noticed the smell similar to burning electrical component almost like when a ballast goes bad, I smelled around and couldnít find source, I have multiple fluorescent lights so I assumed one was going. Unplugged everything and within a day smell was gone. I did not notice any heating problems, garage is kept around 35-40 degrees.
I noticed the smell again 2 weeks ago, unplugged all checked lights problem resolved.
Until today, I was in the shop all day yesterday and today ( maybe youíve heard about our Midwest snow storm) so noting to do and a warm shop project time.
Yesterday everything fine, left heat up all night returned this AM no problem, until around noon, I went in for quick lunch came back out and noticed a weird gurgling sound come in from heater, but no fan running, I spend quite a bit of time out there and have never heard this before. So I turned down thermostat and shut breaker off, waited 1/2 hour turned up thermostat and heard click than gurgling sound again.and the burnt electrical smell was present. So used air compressor and blew everything out I could. Turned back on, while shooting air in and heard burner kick in but no fan, which usually runs briefly before burner kicks in. So Iím thinking bad fan. Find number on fan check local joints still open in snow storm, no luck, turn thermostat down and breaker off, go into house to look up Amazon to find replacement, But Iím questioning this as the fan was fine yesterday and until noon. When I come back out I had the idea to put a fan behind the heater to force air through until I get replacement, but before I got the fan hung up I turned thermostat back up, It works, WTF. Still hung little fan behind and the heaters been running normally. So Iím thinking possibilities, 1 Flame roll out switch, faulty Hot Surface Flame Ignitor, or faulty Flame sensor.
So if you have expertise or experience with this type of heater and have managed to wade through this narrative and have suggestions to eliminate one component or another feel free to add your thought. I suppose it could be a faulty circuit board as well or something like a crack in the heater core.
Thanks for any and all ideas.