Ideal Thermostat Pocket 174870

The Ideal 174870 is a thermostat pocket — the sleeve that houses a thermostat phial or temperature sensor so the probe sits in direct contact with the water it is measuring. It is supplied by Ideal and is used across the Ideal Commercial and Ideal Solar appliance families, including the solar thermal packs and the Thermstore cylinder range. The pocket protects the probe from the water while still allowing it to read cylinder or pipework temperature accurately.

• Temperature readings from the cylinder or circuit are erratic or clearly wrong, suggesting the probe is no longer seated correctly.
• The sensor phial is loose in the pocket and cannot be held against the pocket wall.
• Scale, corrosion or pitting on the pocket surface, which insulates the probe from the water temperature.
• Water weeping from the pocket thread or its connection to the cylinder or pipework.
• The probe will not slide fully into the pocket, or the pocket has been distorted during servicing.

• Confirm 174870 against your appliance's parts list before ordering, as the same pocket is used across several Ideal Commercial and Ideal Solar models.
• Check the alternative number 1780284 if your documentation or existing component shows that reference.
• Match your appliance model and serial number against the compatibility list below to confirm the fit.