You mean it is frozen, the overflow discharge pipe(about 3/4" in diameter) frozen in basement? 3 X6 Y: l3 V* f/ _3 T. v' ?6 D/ D1 \. x1 f* {
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). o! O3 x( ^3 w( M2 `
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Close the main water inlet valve; % [ l. j w8 B0 |0 f& m* }4 sopen all faucets in the house including showers to drain all water out in the pipe line; q0 u1 r, A& I e0 W( \( I8 R P
Close the cold water valve to the water tank if you have one; . t0 J' S/ C$ E: _# O. B& c3 ZShut down the hot water tank by closing the temperature switch to off; 9 }) v9 {3 Z3 a! S3 ~' jOpen the drain valve at the bottom to drain all the water out; " N, ~% `0 W7 G4 q/ I$ I4 \Then remove the expansion valve, go to home or Canadian tire. they all have one.; b2 I2 g( F% R& ]) l/ s
1 z9 D7 u2 M: t: s6 N% l0 uAny doubt text me at 780-880-26988 l) i* Y+ v! [6 O
sorry I thought you were talking about a hot water tank.... - l, R' m( Z8 }/ j% R8 [/ H$ G - h' q4 ]5 C/ Q& TThe 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. + K/ u: U0 L9 w3 u0 p# {/ p 7 ~# T' t; I: S( c- gIf there is no crack at the housing connector, just re-do the connection when the furnace is off. 7 T, n' E% B* o, C( G0 u/ X $ v5 q, J9 ^+ O) J$ @. {Not a big issue..