Thanks for this information. It appears that the high pressure switch opened first, then high temp limit and then low pressure.
Normally if the pressure switches open it is due to one of the flowing:
1.Blocked or restricted vent intake or exhaust
2.Losing vacuum to switch because water or debris is blocking one of the hoses
3.Main drain blocked preventing water from draining and causing los of vacuum
The high temp limit should only open if chamber overheats.Usually caused by dirty filter,blower failing, dirty evaporator coil,ductwork or return blocked.defective heat exchanger.
Thanks for allowing me to work with you.It appears the scope of your problem goes beyond a simple answer but rather some detailed troubleshooting.I am a licensed heating and air conditioning contractor with just over 30 years in the business.We may need the following tools for troubleshooting. A few hand tools,Volt meter and temperature probe, and be able to do hands on trouble shooing procedures.
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