I recently had new HVAC installed. I am noticing it being little louder than what I had previously. The new system is American Standard 80% efficiency with ECM blower motor. My question is
Can I reduce the fan speed to make it little quieter? - I asked the contractor who installed it and he said he can certainly changed the fan speed but there might be and issue that your ac may get icing. So is that true that by reducing fan speed may create icing issue?
AC is not Turing off automatically even when temp reached to set point. I have checks that the fan is on auto setting and thermostat shows the set temp. If I increase the set temp to higher than what is currently on display then it shuts off automatically but when it gets to desired temp, it does not shut off automatically.
What could be the issue? Thermostat or faulty wiring?
Thank you in advance.