Before It Happens
The Bolec WL701 detects sudden coolant loss early and alerts you before overheating causes expensive engine failure.
WL701 4WD Kit includes:
“
The Bolec WL701 has been a reliable companion for my vehicle. It's a simple yet effective device that offers peace of mind by alerting me to potential engine overheating issues. The installation was straightforward, and the alarm is loud and clear. Highly recommended!
Alex Mathews
”
John Martins
The Bolec WL701 has proven to be a reliable guardian for my vehicle. It's a simple, yet effective device that provides peace of mind by alerting me to potential engine overheating issues. The loud alarm is a clear signal to take action, and the installation process was straightforward. I highly recommend this product to any car owner who values the health and longevity of their vehicle.
Sandy Kumar
As a car owner, I've always been concerned about potential engine issues. The Bolec WL701 has alleviated those worries. It's a simple, yet ingenious device that provides early warning for low coolant levels. The loud alarm is a clear signal to take action. It's a small price to pay for the peace of mind it offers.
Stephen Markus
The Bolec WL701 is a simple solution to a big problem. It's an easy-to-install device that provides peace of mind by alerting you to potential engine overheating issues. A reliable product that every car owner should consider.
Our Packages
WL701 Basic kit
$220
WL701 4WD kit
$240
30 day money - back Guarantee
You are fully protected by our 100% Satisfaction-Guarantee
More Than Just a Radiator Alarm
The WL701 provides cost-effective protection against engine damage caused by sudden coolant loss.
Cost-Effective Protection
Helps reduce the risk of expensive engine damage caused by coolant loss.
Versatile Applications
Suitable for vehicle, irrigation, and tank level monitoring applications, including pump control.
Plastic Tank Compatible
Can also be used with plastic tanks when two probes are installed to complete the circuit.
Built for Real-World Conditions
Designed to protect your engine, reduce false alarms, and make installation easier for both DIY users and workshops.
Engine Protection
Provides early warning before coolant loss leads to overheating and costly engine damage.
7 Second Slosh Delay
Helps prevent false alarms caused by coolant movement on rough tracks, steep climbs, and off-road terrain.
Built to Last
Durable design suited to 4WD, diesel, agricultural, and general vehicle applications.
DIY Friendly Installation
Straightforward to fit with included parts, making it suitable for DIY installs or workshop setup.
FAQ
What does the WL701 do?
The WL701 is a low coolant level alarm designed to warn you when coolant drops below the probe. It can trigger a buzzer, warning lamp, or relay output to help prevent overheating and costly engine damage.
Is the WL701 suitable for both 12V and 24V systems?
Yes. The WL701 is designed for 12V and 24V DC negative ground systems.
Will it give false alarms when driving off-road?
The WL701 includes an approximately 7 second slosh delay to average out coolant level fluctuations caused by vehicle movement, helping reduce nuisance alarms on rough terrain.
Can I install it myself?
Yes, if you are comfortable with basic 12V/24V vehicle wiring. The module connects to ignition power, ground, alarm output, and the probe. Keep sensor wiring away from motors, solenoids, and ignition systems to avoid interference.
Can it be used with a plastic tank?
Yes, but plastic tank installations require an additional earth path so the sensor circuit can operate correctly.
How do I test the unit after installation?
With the ignition on, remove the wire from the probe. In about 7 seconds, the LED should light and the alarm should sound. For a more definitive test, lower the coolant below the probe and confirm the alarm operates as expected.
Does the probe need maintenance?
Yes. Because some coolant inhibitors and conditioners can leave build-up on the probe, it is recommended to inspect it after 6 to 8 weeks and use that result as a guide for future maintenance intervals.
What happens if the probe wire breaks?
The WL701 includes a fail-safe circuit designed to sound the alarm if the sensor connection is broken.
Contact Us About the WL701
Need help with installation, compatibility, trade pricing, or technical questions?
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0480 312 400Engine protection essencials
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Delivery
S15 flate rate
Original Products
Proudly made in Melbourne AUS
