LEONARD M-20-CST, M-20-EST THERMOSTATIC VALVE PARTS

Leonard Parts Troubleshooting Chart
PACKINGS & GASKETS 1. Leak at handle.
2. Leaks between valve cover and base.
3. Volume control will not shut off completely.
Kit 1/M20 includes:
1 M20-3C,
1 M20-3E,
2 M20-3A,
2 M20-6B,
1 M20-6E,
2 M20-5A,
2 MU-4C,
1 M20-10E,
2 M20-9A,
PORT SLEEVE ASSEMBLY 4 Valve delivers either all hot or all cold water or will not mix consistently. Clean or replace port sleeve assembly KIT 2/M20 includes:
2 M20-3B,
M20-6B,
1 M20-G1,
M20-14B,
THERMOSTAT GROUP 5. After replacing port sleeve assembly, valve will not hold temperature. Clean or replace thermostat group ALTERNATE: ORDER
1 M20-1-8B,

OR
KIT R/M20
(SEE DWG. E)
KIT R/M20
OR
1 M20-G2
CHECKSTOPS 6. Hot water by-passes into cold line (or cold into hot)
7. Supplies cannot be shut off completely.
KIT 4/M20 includes:
2 M20-3A,
2 M20-5A,
2 M20-6A,
2 M20-9A

Refer to the Operational and Maintenance guide for full Troubleshooting Instructions.

Items in LEONARD M-20-CST, M-20-EST THERMOSTATIC VALVE PARTS