1. A method of dynamically adjusting the control parameters of a proportional gain and integral time controller disposed to control an HVAC actuator, comprising the steps of: sampling a feedback signal representative of an output air temperature of the HVAC system to generate a sampled signal; generating a smoothed signal based on the sampled signal; determining an estimated noise level of the sampled signal; determining a tune noise band based on the estimated noise level and the smoothed signal; adjusting the gain and integral time values used by the controller if either the difference between a previous setpoint temperature and a current setpoint temperature, or the difference between the current setpoint temperature and the smoothed signal, falls outside the tune noise band; and utilizing the adjusted control parameters to adjust the position of the actuator.