Tub/Shower Faucet 1969 Overlander
I'm a new Airstream Owner. The plumbing system was checked and no leaks, kitchen, bath sink faucets working great, but the tub/shower faucet I can't figure out how to operate. It is a flat plate like knob with hot 180 degrees from cold (on the knob) but the knob will not rotate except for about 1/2". I have had two RV guys out to my place after sending them photos of the knob and it is still not working. Any suggestions how to operate? It almost acts like it is frozen but everything else in good working order so then I think it is me the operator that is not understanding how to turn on.