Troubleshooting

Problem: The desired room temperature is not achieved or maintained.

1. The water supply temperature is too low.
2. The circulating pump is off.
3. The pump output is set too low.
4. The pump connections are reversed.

Problem: The thermostatic radiator valve does not function.

1. The thermostatic operator is not screwed tightly to the valve body.
2. Is a pipe line strainer being used, and has it become clogged. Remove valve, clean strainer and reinstall.
3. Air inside the radiator is reducing radiator circulation. Install a radiator air vent.
4. Air is interfering with system circulation. Install an automatic air vent at the appropriate place within your system.
5. The thermostatic head has been tampered with. Have the thermostatic head re-calibrated by the factory, or install a new thermostatic head.

Problem: The valve cannot be shut off.

1. In most cases this is caused by dirt build-up on the valve insert. The dirt can usually be removed by repeatedly working the valve spindle. To do this, remove the thermostatic operator and push down on the spindle several times.
2. The valve insert has been worn and damaged. The valve insert must be replaced. This can be done without draining the system; use the inservice repair tool.
3. Make sure the thermostatic operator is set on the “0”setting. If it is set on the crystal symbol, the valve will not shut off completely. 

Problem: The valve leaks.

1. The valve insert is loose. Tighten it.
2. The “O” ring seal is damaged. Replace the valve insert.