The heater hoses carry hot coolant between the engine and the heater core, allowing warm air to flow into the cabin. Over time, these hoses can crack, swell, or leak due to heat and pressure. A damaged heater hose can cause coolant loss, overheating, and poor heater performance. Replacing faulty heater hoses ensures reliable heating and protects the engine from overheating.

What is a heater hose replacement?

This service involves removing worn or leaking heater hoses and installing new ones. The mechanic will also check hose clamps, fittings, and coolant levels to ensure the system is sealed and working properly.

Why do you need a heater hose replacement?

A leaking heater hose not only stops warm air from entering the cabin but also reduces coolant levels in the engine. This can quickly lead to overheating, which risks severe engine damage.

Common signs you need a heater hose replacement

• Coolant leaking under the vehicle or near the firewall
• Sweet smell of coolant inside or outside the car
• Overheating engine or fluctuating temperature gauge
• Cabin heater not working properly
• Visible cracks, swelling, or soft spots on hoses

What happens during a heater hose replacement?

A mechanic will:

1. Inspect the heater hoses for cracks, leaks, or wear
2. Drain the cooling system as required
3. Remove the faulty heater hoses and clamps
4. Install new hoses with fresh clamps or fittings
5. Refill the cooling system with fresh coolant
6. Bleed air from the system and test heater function

How much does a heater hose replacement cost?

Heater hose replacement typically costs $180–$400, depending on the vehicle and hose design. If multiple hoses or fittings are replaced, costs may be higher.

Is it unsafe to drive with a leaking heater hose?

Yes. A leaking heater hose can cause coolant loss and engine overheating, which can quickly lead to severe engine damage. The vehicle should not be driven until the hose is replaced.