Peltiers - what the heck am I doing wrong!

[solissydney (Ken)]

Loose Peltier???

LewisM has a problem with his Peltier.
I suggest that his problem could be that the Peltier is installed upside down.

[solissydney (Ken)]

Loose peltier ?

lewisM has a problem with his peltier.
I am suggesting that his peltier is ,installed, upside down.

[MrB (Simon)]

My apologies, with out a quote I had assumed you were replying to Peter's post immediately above yours.

[solissydney (Ken)]

I believe the mistake is mine because I kept thinking of an assembled peltier when I suggested taking it apart for testing whether the hot side of the peltier was actually facing the heat sink.

[rcheshire (Rowland)]

Tellurex FAQ for extensive info on TEC's.

Facing the module. Black on left, red on right and you're facing the hot side.

Heatsinks for TEC need to have a rating of approx 2x the power of the TEC. The operation of the TEC produces heat which must also be absorbed. Maybe heat sink is too small.