you should be looking at taking it apart .... with gloves on maybe? sounds like the relay mechanism is broke, maybe the spring inside it, not a complicated fix - if you can't find another relay handy, there's new springs available for most years
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics