We purchased a new Lennox Model CW88-175E boiler in Nov. 2006. Our goal was more efficient heat and the peace-of-mind of having new, reliable equipment. We have a typical suburban house, with three heating zones, circulating hot water, gas fired.
Since installation we have had noise in the 2nd floor heating circuit. We believe the noise occurs when the thermostat is satisfied and sends a shut off signal. The noise is akin to a "water hammer" except it does not repeat in a stuttering manner.
We had the installer return on several occasions and could not replicate the noise while installer was on premises. The installer drained and refilled the line. We installed foam pipe insulation where some pipes were close. All to no avail.
On our most recent visit, the tech suggested that the zone valve - a Honeywell model V8043F1036 was shutting too fast and causing the noise. He lamented that the White-Rodgers valves closed slower and could fix our problem.
The tech's firm is willing to install a White-Rodgers valve on the circuit for $224 for the part + labor with no guarantee that the fix would solve our noise. I am seeking advice - is this a good investment of $300 ?
noisy heat, Vestal, NY