I will need more information to determine the correct element and switch for your unit. Is it an SMPT 120V, SMPT 208/240V, SMPT-27 120V or a SMPT-27 208/240V? The heating element will depend on the voltage and model.
SMPT 120V element - Tundra Number 42860
SMPT 240V element - Tundra Number AFS341508
If you have an SMPT-27 model you will need to call our sales team. We do not have these elements on our website but we can get them. 1.888.388.6372
SMPT-27 120V element - Wells Number 501981
SMPT-27 240V element - Wells Number 500706
Lastly, I do not see a hi limit switch in the parts breakdown for the SMPT warmers. I have attached a few items below that may be what your looking for.
Answered on 6/6/2011 by Molly from Boulder, CO