If the break is not obvious after close visual
inspection, use a volt meter or 12 volt lamp to help locate the
damage. Turn on the defroster and touch one meter lead to each of
the wide vertical bars along the sides of the defroster. The reading
should be between 12 and 14 volts. If the volt meter shows a negative
reading, reverse the leads.
Now take readings at various places along the
horizontal lines of the grid to isolate the break. When you pass
over the break, the reading will change sharply.
If you do not have a volt meter you can use the
Fighter Test Lamp. A really good way to identify broken
or "worn out" lines is to switch on the defroster in cold/damp
or humid weather to identify which lines are working and which are
broken or damaged.
Once a break or breaks in the defroster grid
has been located, it’s time to consider how to repair the problem.
Repairing Defroster Grids
The 2100 Frost Fighter grid repair material is
designed to repair grid damage. Use the tape in the grid kit
to precisely mask off the damaged area of the defroster. There may
be more than one break in the grid so locate all the damage before
proceeding. The grid kit can repair breaks up to five inches.
After the damaged areas have been located and
masked, apply the repair material using the small cap brush supplied.
Frost Fighter grid repair kits use a highly conductive silver polymer
repair compound. This polymer bonds aggressively to glass and provides
maximum electrical conductivity.
Drying to finish repair
The material dries to the touch in 10 minutes
and is usable in thirty minutes. The conductor is color matched
to the reddish brown colors used in automotive defrosters for nearly
Removing the masking tape after the polymer dries
for a few minutes but before full cure leaves a uniform highly conductive
defroster repair. It is important that repairs be done at normal
room temperatures and that the conductor be allowed to fully cure
before activating the defroster.
Heating to cure is a good idea
Repairs can be completed even more quickly by
applying heat to the repair. A lamp or hair dryer can be used to
2100 Frost Fighter
Defroster Grid Repair - $19.95
Add to Cart | Catalog