Would it need to be prewarmed prior to adding food pans? Maybe put hot pab of water in it to get it started?

Simple physics. Yes, adding a pan of hot water in there will do the trick. Not sure why others don't understand that concept. If you're only putting a single pan, or half pan in there, yes, adding a pan of hot water will help keep the food warmer longer.

How many Standard Full sized disposable aluminum deep trays (12 3/4 x 20 3/4 x 3 3/8) does it hold?

individual track for each food pan; holds 8 combinations of 6'', 4'', and 2.5'' deep food pans. Each compartment holds one of the following combinations: five 2.5'' deep pans, three 4'' deep pans and one 2.5'' deep pan, two 6'' deep pans and one 2.5'' deep pan;

i noticed that my door wasnt sealing properly the other day is there any fix or suggestion to making this work right again?

Our folks often use the Door to lift the unit, thus bending and/or loosening the hinges. They just seem unable to stop themselves from doing it. The bottom of the Door is apparently just too nice of a handle for them not to use! You can buy replacement white door gasket and replacement hinges. Easier fixes than getting folks to pay attention to how they are lifting these. Last 2 I purchased here during manufacturing they really screwed up the heads of the stainless screws in the hinges so we have been unable to tighten those hinges. We will replace those screws when we have time to use EZ outs to remove the screws. So a simple job of tightening the hinges is now more complicated due to a manufacturing issue. The first 2 I purchased here were fine.

Product Dimensions	24"L x 16.75"W x 25"H
Recommended Uses For Product	Catering, Restaurants, Food Transportation and Storage, Kitchen
Special Feature	Insulated, Portable
Container Shape	Rectangular
Closure Type	Snap Clasps
Is Dishwasher Safe	No
Material Type Free	BPA Free
Item Package Quantity	1
Item Weight	30.5 Pounds
Product Care Instructions	Hand Wash Only
Item Volume	1000 Milliliters
Unit Count	1.0 Count
Is Microwaveable	No
Item Form	Box, Carrier, Rectangular, Solid
Manufacturer	Carlisle FoodService Products
Number of Items	1
Specific Uses For Product	Keep food hot, temperature retention, food pan carrier
Size	5 Pan Capacity
UPC	077838121931
Is Transparent	No
Lid Material	Plastic Front-Loading Door
Part Number	PC300N03
Item Weight	30.5 pounds
Item model number	PC300N03
Is Discontinued By Manufacturer	No
Style	Food Pan Carrier
Pattern	Food Pan
Shape	Rectangular
Number Of Pieces	1
Special Features	Insulated, Portable
Included Components	Two snap clasps, Molded with handles
Batteries Included?	No
Batteries Required?	No
Warranty Description	Carlisle warrants to the original buyer that if this product proves defective (manufacturer's defect) within one year from the date of purchase, Carlisle will replace the product free of charge. This warranty only covers manufacturer's defects and does not cover abuse, misuse, normal wear and tear or modifications to the product not made by Carlisle.
Number of Sets	5

Insulated Food Pan Carrier and Warmer, Front-Loading with Handles, Holds 5 Full or 10 Half 2.5" Pans (Sold Separately) with Rugged PE Shell and PU Insulation, Black

Details

Description

Specifications

Common Questions