HVAC Questions? Ask an HVAC Expert for Answers ASAP
we have tried resetting the on-off switch to reset the circuit board on the HVAC unit
yes, we can access it
ok we are lookin
we found it. it is blue. looks like there are 2 wires inside at the middle that aren't connected
is it possible to send you a picture
is this something that can be bought at home depot, lowe's, or ace hardware?
yes it is a 3 amp fuse
the bigger question is why the fuse blew in the first place
although our honeywell thermostat didn't have a C wire, the HVAC circuit board did. We followed the instructions for venstar add-a-wire, using a diode connection between the Y and G. on the circuit board, the Y blue wire was intertwined the a red power wire from the A/C unit. Both wires were coupled with the diode wire, and a single wire from the diode was screwed onto the Y terminal of the circuit board. this was the only time we got power during this new thermostat installation attempt. when we tried to turn on Heat, the unit briefly ran, and then blew a fuse
yes, unit worked with old stat just fine, but our bedroom is on terminal vent, and it gets hot. so, we wanted a remote unit to control temp using ambient temp in bedroom. this is where all our problems have started, trying to follow so-called easy DIY installation.
here is the video we followed:https://www.youtube.com/watch?v=R3pea5qtygo
but, our wiring at the control board looked different. there was a single white wire from the AC line to the C terminal, and the red wire from that line was coupled with the blue wire at the Y terminal. there was a green G wire, a white W wire, and a red R wire.
yes. we tried that, but it was after the fuse was already blown, only we didn't know fuse was blown
huge pain in the ass
and we live in the South!
so, in your opinion, the fuse is the problem, and that new stat that requires C wire can be installed using the G to C method you described. we never use a continuous fan. it would obviated the need for extra wires.
all we have is 10 amp fuses. can we use one of those for tonight?
no such luck
we will go to auto zone in the morning and get some new fuses
Ok, will let you know what happens
Replaced old fuse, wired thermostat and HVAC terminals to use G wire as common (instead of using the Venstar Add-A-Wire system), and voila, system works! Thanks for all your help.