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Who drills thermostats, which drill bit?

Old 10-21-2012, 09:43 PM
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Default Who drills thermostats, which drill bit?

I replaced thermostat and noticed that old one had small air-passing valve, but new one didn't.
Is that a good idea to drill small hole?
Old 10-21-2012, 09:47 PM
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It is a good idea, it only requires a 1/16th" drill bit.
Old 10-21-2012, 09:59 PM
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Check the new stat for a air bleed "notch" (yellow circle). Place the notch at the 12 o'clock position like u would a stat with a jiggle valve. If the stat has the notch or jiggle valve, call it good.
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Last edited by djb383; 10-21-2012 at 10:02 PM.
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