son-inlaw has no heat i changed thermo. just because, the
heater control valve is moveing when switched(vac.) i have
switched man. till my hand went numb. nothing do these cores
clog up easy i know it was driven a few months with h20 only
<img src="/forums/images/graemlins/bird.gif" alt="" /> i drained it out and stained concrete. at the time it
was flushed but not with any real pressure or back flushed
any help <img src="/forums/images/graemlins/confused.gif" alt="" />