You mean it is frozen, the overflow discharge pipe(about 3/4" in diameter) frozen in basement? # v* _/ L3 ?8 f- k0 b! m. I$ c+ b! P8 L7 q- `
Anything related to water frozen in basement is a serious issue, it has to have immediate attention.
Few minutes work if just the safety expansion valve leaks ( most probably only the valve) ) Z& }+ @ l9 s0 L# n4 w6 Z9 O/ \3 D! s, Q/ @: Y: b
Close the main water inlet valve;: [& I" o/ v6 N4 P5 d% o' K
open all faucets in the house including showers to drain all water out in the pipe line;7 J7 u+ l8 E: B
Close the cold water valve to the water tank if you have one;$ U+ d/ L4 K8 C/ t& m0 W
Shut down the hot water tank by closing the temperature switch to off; 0 ~* Z B3 k, e4 w/ K5 G1 R4 m: dOpen the drain valve at the bottom to drain all the water out;, h& R* b- a7 s$ f- F
Then remove the expansion valve, go to home or Canadian tire. they all have one.. a; Y2 R9 u. D0 y5 H* N: J ~
3 P3 r; b. @! @1 N( oAny doubt text me at 780-880-2698 2 b& [* S; ^% A1 v% a. v
sorry I thought you were talking about a hot water tank.... 4 v: r) u# L+ @( ^ * ~( E* p& H5 l. X+ F# u! ^The humidifier is even simpler. The drain hose is supposed to have water go thorough the humidifier filter inside the housing and then goes to drain when furnace is on. % d) _( F' L4 Z+ `2 u4 z! o$ v4 f+ D$ s2 H' ~
If there is no crack at the housing connector, just re-do the connection when the furnace is off. , ]* W! N$ h* |; p( D5 s! F 4 `+ |, w. p/ k& R, ~( }+ F/ ONot a big issue..