Jan 10, 2024 · I am passing 120V through the transformer to 24V thermostat then back through transformer to 120 Volt exhaust fan. (The thermostat is the inline switch to control the exhaust fan) ) …

Jun 15, 2006 · A 40VA transformer at 24 V = 40VA/24V = 1.67A, so 1.67 amps is the max continuous rating on the 24 volt side. That is continuous so it can draw that amperage for a long time and be …

Jan 16, 2014 · Beside lightning and damaged (shorted or grounded control) wires what could cause a failure on a control transformer? The unit is a split 10T HP with heat strips. Twice this unit's has …

Aug 31, 2004 · I usually make this 24V hot or "R" & then ground the other side to make it common. If you reverse your line side leads to the transformer, the ungrounded secondary leads should also …

Mar 6, 2013 · Had the heater on yesterday and at some point when I wasnt around it turned off on its on. Its completely dead at the thermostat, and on the circuit board it doesnt get 24 volts either. So I …

Aug 24, 2006 · Help! My 24v transformer blew on my 10 year old Trane system. I replaced it and the unit ran for a few seconds and then the transformer started smoking and everything stopped. This …

Jun 6, 2020 · Hey guys I’ve got a 120volts to 24volts transformer ..I need to ground the secondary 24 volts side, but there’s no indication on the transformer or from the manufacturer on which one of the …

Nov 4, 2021 · Why are some manufacturers low voltage transformers & circuits wired to true ground? Some manufacturers like Lennox have a dedicated ground from common of the low voltage side of …

Jul 31, 2009 · The 460v to 24v 4amp transformer overload keeps tripping about every 4 hours. Unit is a dx system. Any ideas why. Thanks

Jun 22, 2005 · service call states ac doing nothing, flip t-stat to fan on, nothing, check transformer shows 110 on primary side and 0 on secondary, 24 volt side, changed transformer, turn t-stat back to auto …