SF-30F Suburban furnace (intermittent)

The 'click' sounds like the fan relay. You must not be talking about the clicking of the spark igniter because I do not think it comes on unless you get the sail switch made up which would not be happening if the blower is not running. You might want to see if the sleeve is tweaking something and interrupting the 12 volt feed to the fan. The sleeve should really be secured on the RV letting you easily pull the unit in and out of it. A lot of times the builders don't cut the hole in the RV big enough and just force everything in. In your case, maybe binding something? I had the small hole problem and had to do some "tin knocking" to get the sleeve back in shape although in my case it didn't affect the operation. Made the hole the proper size and put the sleeve back in. Now I can just pull a single screw on the bottom of the unit and slide it easily out of the permanently attached sleeve.

I used a trailer wire plug to make a quick disconnect for mine with extra wire to put it on a sawhorse next to the RV. There was already enough extra gas hose to reach