Grid Filament Repair
- Clean area to be repaired with alcohol or window cleaner. Wipe with a clean, dry towel to remove dust or grease. Place a strip of masking tape on each side of broken section of grid line. See Fig 1 . Apply conductive epoxy repair compound to broken area. Overlap both ends of existing grid line by about 3/4" (19 mm).
- For terminal or pigtail replacement, mask area so epoxy covers grid line and bus bar. Apply a thin layer of conductive epoxy to area where terminal connects and to nearest grid filament. Apply a thin layer of conductive epoxy on terminal and place it in position. Prevent terminal from moving by clamping or wedging.
- Carefully remove masking tape from repaired grid filament. Allow repair compound to cure for 24 hours at room temperature or use a heat gun. Apply 500-700°F (260-371°C) heat for about 15 minutes.
- Hold heat gun 10" (254 mm) from repaired area. After repair compound has properly cured, remove wedge or clamp from terminal. Check operation of rear window defogger. DO NOT attach terminal connectors until curing is complete.
CAUTION:
Glass may fracture if actual surface temperature exceeds 400°F (204°C).