Furnace Blower Run Continuously

[Bugs]

2017 Jayco Eacle 321RSTS.
Sitting in Florida with the AC running. I go into the basement to get something and I hear the furnace blower running. No heat coming from floor ducts. Thermostat is on AC, not heat. Turn electrical power off at pedestal, still running. Turn main red "T" handle off in basement, furnace blower off. Turn red "T" handle back on, furnace blower on. Had to pull 20 amp car type fuse out of electrical panel breaker box to turn furnace blower off. Any ideas to my dilemma? Also, where is the furnace located? Sounds like it is in the basement behind the shore power/water/cable panel hook-up.

[Steve1152]

thermosat wires shorting out

[Bugs]

Found problem. Recently had shower base replaced due to cracks and a hole around the drain. Installer put a screw through the hot water shower hose going to the faucets. Every time we hooked up to water it would drip down the wall, into the basement and on top of the furnace and probably shorted out circuit board. Fixed the leak ad have been running fan in basement to dry everything out. The blower has stopped running but the furnace will not produce heat. In Florida now so don't really need the heat. Upon returning to NH the shop that put the screw through the hose can look at the heater!

[o2silverado]

Nothing like fixing one problem with two more. Good luck !