This is how the heater unit looks like removed from the Volvo (pictured below). Separating the two halves of the box revealed the heater core, blower motor, and about 2 acres of leaf matter. There's some rust on the inside walls of the box and the rubber seals for both the front and rear vents as well as the gasket for the blower housing have long disintegrated. In addition, the blower motor has seized up - even turning it by hand was difficult. So ... lets see, broken capillary sensor cable to the heater core, plus all of the above ... I've yet to send out the heater core to the radiator shop to have it pressure tested, but it probably has leaks too - pretty much everything is shot!
Heater Box:
| Two Halves Separated:
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My initial thought of feeding the remaining capillary sensor cable into the heater unit in replacement of the broken-off piece is probably not feasible either, as the very definition of capillary means that it has an internal diameter to hold liquid. This could only mean, broken capillary sensor cable = no more internal liquid = can't un-ring this bell! The entire heater control valve will need to be replaced if my assessment is correct. I'll have to do more research to find out. Well ... on the bright side, I had enough leaf matter from inside the heater box to make compost for the garden. I probably shoudn't have thrown those out as there might have been some seeds of exotic plant species that went extinct 3 decades ago.
Heater Core Exposed:
| Is This a Rat's Nest?
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