I have been away from home for about three months due to work etc.
Three months ago, (and for the past 8 years) while you were showering,
anyone else could run a tap or flush a toilet without disturbing the
temperature in the shower. Now when a toilet is flushed the water turns to
total scalding heat in the shower. Any ideas on what could have possibly
No plumbing modifications have been done. We are on a well system with
a pressure system. All the water pressures seem normal like they were. Any
ideas as this really has me confused....thanks...Jim
Is the shower control a pressure balance or scald-gard type?
If so, it may have failed (stuck) internally.
Do you have a free-standing water heater (gas or electric)?
Or is water heated from a coil in the boiler? If so, there
may be a tempering valve which has failed.
See what happens to the tap temperature in the lav basin
when a toilet is flushed,. That may give a clue as to whether
just the shower control is affected.
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