The Diono Radian RXT is a premium 3-in-1 convertible car seat designed for children from 5 to 120 pounds. It features steel alloy frame construction, superior side impact protection, fold-flat design for travel, adjustable headrest and harness, multiple recline positions, and compatibility with LATCH system and seat belt installation. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.
Key components: Steel alloy frame, adjustable headrest, 5-point harness system, fold-flat mechanism, side impact protection, multiple recline positions.
| Feature | Description |
|---|---|
| Steel alloy frame | Provides superior strength and durability |
| Adjustable headrest | 12-position adjustable headrest for growing children |
| 5-point harness system | Enhanced safety with quick-adjust harness |
| Fold-flat design | For easy storage and travel |
| Side impact protection | Energy-absorbing foam and deep wings |
| Multiple recline positions | 3 recline positions for comfort |
| LATCH system compatible | Easy installation with Lower Anchors and Tethers for Children |
| Seat belt installation | Alternative installation method |
| Infant positioning | Includes infant insert and body pillow |
| Compact design | Fits 3-across in most vehicles |
Unpack and inspect contents. Read all instructions before installation.
WARNING! Always install according to vehicle and car seat manufacturer instructions. Ensure seat does not move more than 1 inch side-to-side or front-to-back when installed.
Prepare car seat for first use with proper configuration.
CAUTION! Never leave child unattended in car seat. Ensure all adjustments are secure before each use.
Access adjustments via various controls on the car seat.
Headrest Adjustment: Lift headrest adjustment handle and slide up or down to one of 12 positions.
Harness Adjustment: Quick-adjust harness system with harness tension adjuster at front of seat.
Recline Adjustment: 3-position recline adjuster at base of seat.
Harness Height: Adjust harness height without rethreading by moving headrest.
Crotch Strap: 3-position adjustable crotch strap for proper fit.
Two installation methods available: LATCH system and vehicle seat belt.
Tip: Always check for secure installation by pulling firmly at the belt path.
Proper usage guidelines for different modes and child sizes.
WARNING! Always use top tether in forward-facing mode. Never use in front seat with active airbag.
Superior Side Impact Protection: Energy-absorbing foam and deep wings. Safe Stop Harness: Energy-absorbing harness for forward-facing installation. Quick-adjust Harness: Easy adjustment without rethreading. Aluminum Reinforced Frame: Lightweight yet strong construction.
Remove cover and harness before cleaning. Machine wash gentle cycle, cold water. Air dry only - do not machine dry. Spot clean shell with mild soap and water.
CAUTION! Do not use bleach or harsh chemicals. Never submerge harness in water.
FMVSS 213 compliant. Meets or exceeds all federal safety standards. ASTM International standards. This child restraint system conforms to all applicable Federal Motor Vehicle Safety Standards. Manufactured by Diono LLC. For support, visit www.diono.com or contact 1-855-463-4666.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Car seat moves excessively | Improper installation | Reinstall using proper technique; ensure less than 1 inch movement. |
| Harness too tight/loose | Improper adjustment | Adjust harness tension; perform pinch test at shoulders. |
| Child slouching | Incorrect recline angle | Adjust recline position; ensure proper angle for child's age. |
| Difficulty adjusting headrest | Obstruction or mechanism issue | Check for obstructions; ensure adjustment handle is fully engaged. |
| LATCH connectors not engaging | Vehicle anchor access | Ensure clear access to anchors; press firmly until click. |
Replacement Parts: Contact manufacturer for replacement parts only.
Customer Service: 1-855-463-4666; www.diono.com