Max / Min Thermometer Problems

[Alison]

I always have a max / min thermometer in the greenhouse. Last year the one I'd been using for years went funny and started reading about 10 deg different on the max and min sides. I'd had it for about 10 years so assumed that it'd broken so invested in a new one. However the new one isn't reading right either and I think it has bubbles in the tubes. Does anybody know what I can do to get rid of them and get it back working OK. Note that I've already tried putting it in the freezer to force it one direction and have tapped it for England (I've probably got RSI now ). Help needed as it's really annoying me. Thanks

[SarzWix]

Mine went a bit funny after I accidentally dropped it. I held the button in and SHOOK it downwards with quite some force... It seemed to work for a little while, then went funny again I'm going to invest in a digital one as soon as I can afford it...

[Alison]

Hmmmm, maybe digital would be the way to go but they are rather expensive and the previous one had worked perfectly for so long.................

[SarzWix]

Minimum Maximum Thermometer

This is the cheapest ordinary one I've found, I might get one as a temporary replacement. Save the digital one as a christmas pressie request

[lynda66]

try putting it in water then bringing to the boil too that often forces the liquid together, don't put straight in boiling water it may shatter

[Alison]

try putting it in water then bringing to the boil too that often forces the liquid together, don't put straight in boiling water it may shatter

Thanks - was thinking of making a brew so am off to the kitchen to give it a go

[lynda66]

you need to heat it till it goes to the top

[Alison]

I still have air bubbles, the thing that records the temp on the max side is now about an inch below the top of the max temp reading (don't ask, I've no idea) and the plastic on the bottom of the thermometer has warped in the heat (and I didn't let it touch the pan) so think I'm going to have to buy a new one

[lynda66]

whoops i never thought of the plastic ...... hmmm it does sometimes take a few goes, but i've done it in the past and it's mostly succeeded

[marathon]

Minimum Maximum Thermometer

This is the cheapest ordinary one I've found, I might get one as a temporary replacement. Save the digital one as a christmas pressie request

digital max /Min £9.99 I've got one and it's great

[Two_Sheds]

Mine (B&Q) always go funny after a few months outside ... I have always taken them back for a refund, but can't be bothered this time (the latest one shows 2 different readings for regular and digital)

[teakdesk]

If the £9.99 digital one is the from B&Q (and other GCs) then they have recently changed their design.

The OLD design (still available in GCs) has two round buttons sticking out of the front for reset and degC/degF which I think let moisture into my first one after two years.

The NEW design has a sealed front covering the button mechanism.

The old one lasted me two years but went wrong over winter. The new one is... well... new so can't say how much better it is.

[Flummery]

I think I'm going to need a digital. Mine reads a bit different each side so I add a couple of degrees to what appears to be the min and it seems about right.

[mrdinkle]

I've dropped mine a several times and it is giving wonky readings.

When I replace it, I think I'll cable tie the new one so it can't be dropped!

[NOG]

try putting it in water then bringing to the boil too that often forces the liquid together, don't put straight in boiling water it may shatter

Be very careful...I put one in warm water and turned up the heat...then it exploded at abot 80o.