Sta-Rite 400 heater Problems

[kptfire]

We have a Sta-Rite 2-spd pump and a Sta-Rite 400 heater. When the pump is in low-speed/low volume, and the heater is not on, there is a high-pitch whine coming from the heater. However, when the heater is off and the pump is in high speed/high volume, there is no whine. Is anyone using the Sta-Rite 2-spd pump with the Sta-Rite 400 heater? Are you or have you experienced this problem? What did you do to rectify the problem?

Thanks,
Pamela

[lunaticfringe]

call 831-7133