the question will come up, to repair or replace your furnace when home owner has to deal with a big service cost such as replacing a main electric board.
No one can help but each individual has different conditionsrepair or replace!!!!!!!!!! there will be 2 conditions ahead of you,1- if your heating system still under some sort of warranty, which is best way to follow2- no warranty available, then get few prices. if you feel prices are too high base on parts, you start to get price for new one considering your furnace age

how old its Your Furnace ?
never forget to consider age of your equipment, if they are 10 yra and older, it might have good chance that needs more of repair cost.never be worry about your finance,we always here to help for your financing
https://alliancehvac.ca/financing/

 Efficiency of new furnace !!!
base on province and by-laws, with new climate consideration, most of the new furnaces are inefficiency with minimum of 92% up to 98% modulating Lennox slp98.replacing new furnace with old mid furnaces with max 85% efficiency to new 98% efficiency and all Safety Concerns will be huge saving for you as a client.starting to pay the ongoing cost of repair will unconfutable your finance and comfort.one of other reason to be aware of uneven heating in your home is to have old furnace3 with AC blower motor.And if various household members have different temperature preferences, use this opportunity to install a new zone-based heating system.
How loud it’s your furnace ??
it’s easy to find out if your furnace motor running with pressure and lots of loud noises, that would be great sign for been unsafe and attention need time for furnace repair or replacement.with all advised mentioned above, you always need hvac repair export near you, please feel combatable to call best hvac contractors in Toronto at alliance energy source416-259-6767