I have a used EKO and when I bought it it came with a Taco circ 1400 B..I installed it with the circ it came with so I have no idea of it's age but today when I went down to see why the house was still at stat temp where it belongs just like it's been, I noticed the circ is making a squeeking or chirping noise I have not changed anything, should I be ready to strap a new circ to the EKO or is there any other reason it would be chirping??Dave