My 2014 Volt has exactly the same problems.
My 2014 Volt has exactly the same problems. Clicking noise coming from front axle when stopping/starting. Also no heat in EV mode only. 42k miles. Out of warranty. Volt with similar heater problem is being worked on waiting for pump part number 13597899. It's on backorder. Service advisor says sometimes a backorder means there is an issue with the part and a new part number will replace it. He recommended that I wait but this is a cold winter so I'm not using EV mode much. Very unhappy and am planning to communicate my feelings about GM to everyone. I've talked others into buying Volts but now I feel guilty. Sales and service has been an old school low class experience compared to their competitors. Please keep this thread updated with any solutions you discover. These are defects that should be covered for free even after the warranty period has ended.So I took my 13 to the dealer for the axle click noise and no heat most of the time I'm on electric.
They said my caliper slides need to be lubricated to fix the axle click noise. They want $70 an axle and want to do both axles. And they want to reprogram the HVAC module for $218 plus a $109 diagnosis fee. I told them I'll pass on everything.
After the car sits at night I have heat. If I stop somewhere and shut the car off then back on again within a few hours I won't have heat the 2nd time. If the car sits 5-6 hours the second time, I'll have heat.
They are reprogramming the charger module under voltec warranty as there was a code for it.
The SW actually told me the engine NEEDS to run to produce heat as the car needs to be in open loop to make heat. So basically he doesn't have a clue. And this is the dealership with the volt specialist in the area.
kWh jumps up as if the heater is drawing power but no heat.