I know my buddy and I may need to replace our furnace soon

Sadly, my hubby plus I have been having furnace problems for the past couple of months.

My buddy and I thought that my buddy and I fixed whatever was wrong with it, however it started happening again last week, so my buddy and I aren’t sure what it wrong with our heater.

My hubby replaced a part a few weeks ago, plus the problems seem to be resolved, however it must not have been what was wrong. My hubby has a friend who works in the Heating, Ventilation as well as A/C industry, plus he is going to ask him to come over plus look at our furnace tomorrow. The furnace randomly turns off, plus it does not fire back up unless my buddy and I go downstairs plus manually turn it back on. My buddy and I aren’t sure if it is the temperature control or the furnace itself. I wish that one of us knew more about Heating, Ventilation as well as A/C units, however neither of us paid attention when our fathers tried to teach us. My buddy and I both regret our decisions now. Both of our fathers were great at fixing just about anything Heating, Ventilation as well as A/C related. They have both passed away now, so my buddy and I can’t call them for advice. I recognize my hubby’s friend is our last hope. My hubby plus I are both afraid that my buddy and I are going to have to get a new heater. If it comes down to having to buying a new furnace than, of course, my buddy and I will, however my buddy and I genuinely hope that it is a smaller fixable issue. Thankfully, my buddy and I have enough money in savings to buy a new furnace if that is necessary. My buddy and I genuinely wanted to use that money to fix our vehicle though, so my buddy and I hope the furnace doesn’t take up all of our savings.
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