Suburban uses 2 different sets of t-stats.....one set for 120V AC element and one set 12V DC for propane
If the normal t-stat fails to OPEN at preset temp (130*F) then the HI temp one is preset to 'trip' OPEN (170*F)
When it trips it has to be 'reset'
In outside compartment left side is a rubber cover with 'Push to Reset'
Left button is for electric element.
Push it and see if it resets. If it does electric element should get power again.
BUT you will need to replace that set of t-stats cause normal is not opening and water will heat to 170*F then trip HI temp t-stat again.
IF it's not a tripped t-stat then it could be:
Loose connections, faulty element, tripped 120V CB
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31