When I look inside the cell, there appears to be a thin thread-like nylon line that rests on the end of the cell plates. Is this normal?

Yes. It is time for you to clean the cell. If you don't know how to do that, ask at your local pool supply store. Cleaning of the cell involves a cup or two of Muriatic Acid. Leave the acid in the cell with the open end facing up and to soak for about 20 minutes. Be very careful if you clean it with acid as Muriatic Acid is strong and corrosive and will burn exposed skin. Also, use caution not to breathe in the fumes. If allowed to build up, that stringy material will eventually cause your cell to fail to make chlorine for your pool.

Does this replace the SC 36?

Yes. It is the replacement for the SC36, which I believe has been discontinued by the manufacturer.

After about 3 months of use i am getting an error message from my auto pilot 'low amps=cell?. checked the cell. it has no build up. any solutions?

Likely to be a cord issue however depending on the model # of your Pool Pilot control box it could be a internal issue on the circuit board(s) or a fuse.

Height	6.2 inches
Length	12.9 inches
Width	6.4 inches
Batteries Included?	No
Brand	Autopilot
Item model number	PPC1 (formerly RC35/22)
Product Dimensions	32.77 x 16.26 x 15.75 cm; 1.34 kg
ASIN	B003WW4WBQ

Autopilot Pool Pilot Digital Chlorine Generator Replacement Cell Only With Unions - PPC1 (Formerly RC35/22)

Description

Specifications

Common Questions