Thanks very much for your timely reply. I made the changes as you indicated and we'll see how it goes when I fire up the furnace this Fall. Needless to say, you have gained a loyal fan. Thanks again.

Gary

Hi there, Glad I found this forum. I have a 2 yr old Intertherm M3RL 060A furnace with NO A/C. Problem is the blower speed is really high! And very distracting in my small trailer, as you can imagine. Looking at the manual, Figure 27, shows the location of the speed taps on the circuit board on the ...