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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Thermostat will not turn equipment on. modelL7742U. it will

Customer Question

thermostat will not turn equipment on. modelL7742U. it will change on screen but does not activate anything. Checked all curcuit breakers OK on AC and heat units
Submitted: 7 months ago.
Category: HVAC
Expert:  airheatman replied 7 months ago.
What is model n the unit it controls and can you do some hands on troubleshooting?

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