My special thanks to Mr Lowenbrau thank you for the info sir. I hope that is the right company. My mechanic told me that they supply OEM quality plug in heater for Toyota. More expensive than the NAPA or O'reilly ones but that's okay. However, I will check the plug in cord first or replace it with a new one. I hope that will resolve the issue.
And cruiser88 come on man you don't need 4 block heaters for a 4 banger engine what kind of comment is that? What are you, drunk?
A couple more q's:
1. Does plug in the heater right away after commuting drive, when the coolant is still hot, is this a no no? Can the heater burn out from doing this?
2. The reason my mechanic charges 2 hours labor is because he said they need to run compression test again after installing the new heater. Does this sound right? A compression test? Hmm

that's what got me so reluctant in doing it myself. I just don't want to mess up and doing more harm than good. I've been that road before it's not fun. Trying to save a few $$ but end up costing more $$$.

Some things are better left done at the shop.
Gracie gracie senoras senores.