I have a heat pup that is completely down. Not only does the outside unit not come on, the inside fan which i usually leve on all the time will not work. Kim have chechedbthebcircuit breakersandbthey are all ok. I changed the batteries in the thermostat but still nothing works including the light that illuminates the hightail readout on the thermostat
Brand: Amrican standard
Type of HVAC: Heater & Furnace
Checked circuit breakers changed batteries in thermostat
Hello there! I'm Norman but you can call me Norm. Let's see what I can do to get you some answers today. I'm ready to get started whenever you are.
When you say you checked the circuit board did you check the 3 or 5 amp fuse on the board to ensure it wasn't blown?
Did you open the access doors to the furnace cabinet and look on the printed circuit board itself?
internal to the unit
Your furnace should have two doors that come off. Once you get them off you will see a circuit board mounted in the same cabinet as the blower motor. On that board you will see a 3 or 5 amp Car Type fuse sticking straight out with a 3 or 5 printed on the back end. Pull that fuse out and hold it up to the light. See if its burnt or blown.
the fuse may be purple or yellow
No problem, I will be standing by.
Ok there we go. You can find the exact size replacement at most any auto-parts store and switch it out. Make sure to install the same 5 amp fuse size you pulled out.
If it blows again once changed you may have other problems. It could have blown from a power surge or something simple.
Buy a couple so you have some laying around.
If it blows right away to the next fuse something is shorting out and causing it. the only way to tell would be swap in a new one. If it blows you will need to inspect all low voltage wires for nicks or rubs, etc. If nothing is found it could be the transformer causing the problem.
If you had lightning when it happened the fuse has probably blown because of that.
yes that will be fine
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NC/VA Master HVAC & Gas, Air Balance, LG Master Commissioner
Hi. As it turns out. It happened again in two days. This time a fuse change did not solve the problem. Mice had gotten in the outside and ate wiring. Cost 468.00
Wow those are some expensive rodents.