You mean it is frozen, the overflow discharge pipe(about 3/4" in diameter) frozen in basement? . _& @* k( {' ?& k0 U3 g4 ^$ r % {1 G7 ]- j" a- G# }. FAnything 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) / W: e( v5 a7 k# r$ L, f [: p : i4 s: a/ h* `3 ~Close the main water inlet valve;2 U& r/ _$ q) E. B6 m, L
open all faucets in the house including showers to drain all water out in the pipe line;' Z; E: s2 Z3 e0 T
Close the cold water valve to the water tank if you have one; " w# w& i, o `/ E7 qShut down the hot water tank by closing the temperature switch to off; # ^( V) U9 s1 j; V7 W; aOpen the drain valve at the bottom to drain all the water out;8 V- p. `! q$ R S+ q8 T
Then remove the expansion valve, go to home or Canadian tire. they all have one.0 |6 L# j# c+ K4 X2 c
% S `" x( r4 v; Q& P6 wAny doubt text me at 780-880-2698: s6 v1 W7 [8 J+ M
sorry I thought you were talking about a hot water tank...." p* {3 O2 {4 ]) _6 b! e3 D+ z! ]. N8 O
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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.. }: b! K% r. `: a$ I
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If there is no crack at the housing connector, just re-do the connection when the furnace is off.8 i- }7 F* T* ?, E$ [. v