Posts Tagged ‘ Electronic ’

Have moved into a house where previous owner replaced simple mechanical type thermostat (with mercury bulb) with an electronic unit. Mechanical type obviously just closes a contact to complete the gas valve circuit and so get 24V across gas valve coil.
Obviously 2 wire electronic unit cannot do this because the unit needs to draw power for the electronics.
The new thermostat is giving unreliable operation, am thinking of replacing it with the old unit which I found and appears to be functional (checked with multimeter).

• Compatible with most furnaces and cooling systems
• Environmentally friendly mercury free design
• battery powered -batteries not included

Product Description
Hunter Electronic mechanical thermostat is easy to use, is more accurate, has a larger read out display has updated aesthetics at the same cost…. More >>

Hunter Electronic 40135 Mechanical thermostat – heat/cool