Few things are more frustrating than grabbing your snow blower handles on a freezing morning only to find cold, unresponsive grips. If your Husqvarna snow blower heated grips are not working, the culprit is almost always a simple electrical issue you can fix yourself in under an hour. Hand fatigue, reduced control, and even frostbite become real risks when heating systems fail during peak winter use.
The Husqvarna Heated Lever Grip Kit (part number 599 42 39-01) fits 200, 300, and 400 series models from 2014 onward, including the ST 224, ST 224P, ST 227, and ST 230. Most failures trace back to pinched wires, loose grounds, or failed switches rather than the generator itself. This guide walks you through every diagnostic step using basic tools, plus a smart modification to boost heat output in milder climates.
Verify Heated Grip Compatibility
Confirm Your Model Supports the Kit
Before diving into electrical tests, confirm your snow blower can actually run heated grips. The 599 42 39-01 kit fits Husqvarna 200, 300, and 400 series models manufactured in 2014 or later. Confirmed compatible models include:
– ST 224
– ST 224P
– ST 227
– ST 230
If your unit predates 2014 or falls outside these series, the retrofit likely won’t work. Check your owner’s manual or use Husqvarna’s parts lookup with your serial number to verify.
Spot Red Flags From Poor Installation
A botched installation can kill heated grip function immediately. Watch for these warning signs:
– Wires routed outside protective channels
– Pinched or frayed wiring near pivot points
– Loose T30 self-tapping screw on the heated base pad
– Power steering trigger misaligned after the kit was added
If any of these apply, revisit the original installation steps before troubleshooting electrical components. A misaligned trigger or crushed wire will cause repeated failures.
Inspect Wiring for Physical Damage
Trace the Heated Grip Wire Path
The heating system uses a red power wire running from the flywheel area to the heater switch, then splitting to power both the handlebar and back grip. A black ground wire completes the circuit by connecting to the cylinder mount.
Follow the wire from the handle down through the frame. It should travel through the designated channel under the cover. Pinching during reassembly ranks among the top causes of heated grip failure.
Examine Areas Prone to Damage
Inspect the entire wiring harness, focusing on high-stress zones:
– Areas near pivot pins and hinges
– Spots where wires pass through metal brackets
– Connection points at the switch and heating elements
Look for exposed copper strands, brittle or cracked insulation, and discoloration from heat exposure. Gently wiggle wires while the system is powered to reveal hidden breaks. Intermittent heating during movement almost always points to a damaged wire.
Test the Heater Switch
Disconnect and Isolate the Switch
The heater switch controls power delivery to both grips. When both grips fail simultaneously, a faulty switch is a prime suspect.
Start by turning off the machine and disconnecting the spark plug for safety. Locate the switch wiring near the handlebar base and disconnect both red wires from the switch terminals.
Run a Continuity Check
Set your multimeter to continuity mode (beep setting). Place one probe on each switch terminal. Flip the switch to ON and listen for a beep. Flip to OFF and confirm silence.
Interpret the results:
– No beep in ON position = faulty switch (replace it)
– Beep in OFF position = internal short (replace it)
– Beep only when wiggled = loose connection or worn contacts
If continuity fails, source an OEM replacement with matching voltage and amperage ratings.
Diagnose the Handlebar Heating Element
Disconnect Power to the Handlebar
The handlebar houses the primary heating element. Internal filament breaks, especially after physical impact, are common failure points.
Locate the two-wire connector between the harness and handlebar heater. Unplug it and set your ohmmeter to continuity or resistance (Ω) mode.
Interpret the Test Results
Touch one probe to each terminal of the handlebar heater. A beep or low resistance reading (5–20Ω) confirms a healthy element. No beep or an OL (open loop) reading signals a broken heating element.
Even if the outer wire shows continuity, a bent or cracked handlebar can sever internal heating filaments. Physical damage means you need to replace the entire heated handle assembly.
Check Ground Connection Integrity
Locate the Black Ground Wire
A solid ground is non-negotiable for the circuit to function. The black ground wire connects from the heating system to the cylinder mount or engine block.
Find the attachment point, usually a bolt near the engine base. Verify the wire is firmly fastened and making direct metal-to-metal contact. Paint, rust, or corrosion under the ground bolt can break the circuit entirely.
Clean and Reconnect Corroded Terminals
Remove the ground bolt and sand the contact area on both the wire terminal and mounting surface until bare metal shows. Reattach the wire and tighten it securely.
Test the ground with your ohmmeter by checking continuity between the ground wire and engine block. Near-zero resistance confirms a solid connection.
Verify Generator Output
Understand How Power Generation Works
Husqvarna heated grips draw power from a flywheel magnet passing the generator coil, producing electricity as the engine runs. The generator itself rarely fails, though loose bolts can cause the flywheel to rub against it, a clear sign of improper assembly or long-term vibration damage.
Test Generator to Switch Continuity
Set your ohmmeter to continuity mode. Place one probe on the generator output terminal and the other on the input wire at the heater switch.
A beep confirms intact wiring from generator to switch. No beep means a broken wire or failed generator coil. If the wire path looks clean, the generator itself may need replacement.
Inspect Back Grip and Link Wiring
Test Continuity to the Rear Grip
Some models include a heated back grip wired in series with the handlebar. To test, disconnect the wire between the back grip and handlebar, then check continuity from the output wire of the back grip to the input wire of the handlebar heater.
A beep confirms intact wiring. No beep means a break in the line that requires repair or replacement. Make sure connectors are clean and fully seated, since moisture ingress can cause corrosion over time.
Disable the Carburetor Heater for Extra Warmth
Understand the Power Split
The heated grip system also powers a carburetor heater that activates below -10°C (14°F) via a built-in thermostat. This draws power away from the handlebar and back grip, reducing overall warmth.
In milder climates like the West Coast or urban areas, the carburetor heater rarely activates and can be safely disconnected.
Redirect Power to Your Grips
Locate the carburetor heater wires (red and black) and unplug them at the carburetor. Leave the ends disconnected and dangling. No taping required.
This simple modification redirects more current to the handlebar and back grip, increasing warmth noticeably. It’s especially helpful for users with arthritis or poor circulation.
Run Final Installation Safety Checks
Confirm No Wires Are Pinched
After any repair or reassembly, operate the auger control and power steering through their full range of motion. Watch for wire snagging, tension, or contact with moving parts. Route wires in front of the handle supports, not behind, to prevent crushing during future reassembly.
Verify All Bolts and Clips
Double-check that every fastener is secure:
– C-clip fully seated on the pivot pin
– 5/16″ bolts tight on handle base and power steering trigger
– T30 self-tapping screw secure on heated base pad
– Hinge pin properly aligned and seated
A loose component can damage wiring or create serious safety hazards.
Prevent Future Heating Failures
Perform Seasonal Electrical Inspections
Before winter arrives each year, inspect all wiring for cracks or wear. Clean switch and connector contacts with electrical contact cleaner. Confirm the ground connection is tight and corrosion-free, and test continuity across all components.
Store your snow blower under a dry cover to prevent moisture buildup in electrical connections.
Upgrade Key Winter Components
A few simple upgrades improve cold-weather reliability across the board:
– Nylon air filter (black/white mesh): resists clogging far better than fuzzy flock filters
– Blue air injection tube: directs warm engine air to the carburetor instead of cold, snow-laden air
– Snow cover on the starter: prevents ice buildup in critical areas
These upgrades reduce strain on electrical systems and improve overall winter performance.
Frequently Asked Questions About Husqvarna Heated Grips
Why are my Husqvarna snow blower heated grips not working?
The most common causes are pinched wires from improper reassembly, loose or corroded ground connections, failed heater switches, and broken heating elements inside the handlebar. The generator itself rarely fails unless mounting bolts have loosened.
How do I test heated grips with a multimeter?
Set your multimeter to continuity (beep mode). Test the generator-to-switch wiring, the heater switch, the back grip link wire, the handlebar heating element, and the ground connection. A beep confirms continuity; silence indicates a break or fault.
Can I disable the carburetor heater on my Husqvarna snow blower?
Yes. Simply unplug the red and black carburetor heater wires at the carburetor and leave them disconnected. This redirects more power to the handlebar and back grip, providing noticeably warmer grips in climates where temperatures rarely drop below -10°C (14°F).
Which Husqvarna models are compatible with heated grip kit 599 42 39-01?
The kit fits 200, 300, and 400 series Husqvarna snow throwers from 2014 and newer. Confirmed compatible models include the ST 224, ST 224P, ST 227, and ST 230.
How much does the Husqvarna heated grip kit cost?
The Husqvarna Heated Lever Grip Kit (part number 599 42 39-01) retails from $159.00.
Do I need to take my snow blower to a dealer for heated grip repair?
Not usually. Most heated grip problems stem from wiring, switch, or ground issues that you can diagnose and fix with an ohmmeter and basic hand tools in under an hour.
Key Takeaways for Restoring Your Husqvarna Heated Grips
A non-working heated grip system on your Husqvarna snow blower is almost always repairable at home. Methodically checking wiring, the switch, ground connections, heating elements, and generator output will identify the fault in nearly every case. For users in milder climates, disabling the carburetor heater delivers a meaningful boost in grip temperature without any downside.
Start your diagnosis with a visual wiring inspection, then work through the continuity tests in order: generator to switch, switch function, back grip link, handlebar element, and ground. With proper seasonal maintenance, your heated grips will deliver reliable warmth for many winters to come.
