HVAC Vacuum Check Valve – Black / Blue

Description

Mk1 & Mk2 HVAC Vacuum Check Valve

Restore your Sciroccos HVAC system with this new Non Return HVAC Vacuum Check Valve. It will improve / restore your HVAC controls and prevent any leakage in the vacuum system. These are used to keep vacuum retained in the system until vacuum is needed, even with the engine off. Overtime these will wear out and stop holding vacuum.

Diagnose a HVAC Vacuum Check Valve

To check these valves, check with a vacuum testing tool. If you are brave, simply suck through each end. If pressure can be sucked though both sides, the valve is bad and needs replacement.

These valves are used in the vacuum system to control the brake booster, HVAC & EVAP systems. If you have idle issues, this may also be faulty on your vehicle. Also check the vacuum connector hoses. Even if the rubber connectors look ‘ok’, they may need replaced. Vacuum check the entire system, to determine if they are in fact leaking. We use a Mityvac MV8000 tool to test this.

SPECS:

Replaces Part No: 843 820 675 / 843820675
Black / Blue – or – Green / Blue – Both are the same spec.

HVAC Vacuum Check Valve for Mk1 & Mk1 Scirocco

Mk2 8v & 16v HVAC Controls – Ref: #19 In rain tray

Also Fits:

All Mk1 & Mk2 / A1 & A2 Volkswagens