Hi,

firgidaire fpda18tp

That is part of a full model#...I found...
FPDA18TPL0 FPDA18TPL1 FPDA18TPL2 FPDA18TPLL0 FPDA18TPLL1 FPDA18TPLW0
FPDA18TPLW1 FPDA18TPW0 FPDA18TPW1 FPDA18TPW2

Most showed the defrost timer up beside the cold/temperature
control....in that housing.

http://www.repairclinic.com/referral.asp?R=153&N=12762
Defrost timer control.

jeff.
Appliance Repair Aid
http://www.applianceaid.com/