Is it time to replace the Volvo 850 heater core?
A couple of weeks ago when cleaning my Volvo 850 I noticed that the carpet on the passenger side was slightly wet. First supect… the heater core! Removing the dashboard lower panel confirmed that it was faulty, so it was time to replace it.
Where is the a / C heater on a Volvo?
Doors are controlled by cables on left side and center of climate control unit. Fresh/recirculated air is selected by switch to lower right of mode knob on A/C-heater control panel. Door is controlled by recirculation motor on upper half of climate control unit. Air conditioning system will only operate above 32 F (0 C).
How does the air conditioner work in a Volvo 850?
The heater (blower motor) fan is controlled by ECC output (power) stage. Air conditioning system will only operate above 32 F (0 C). Blower switch must not be in zero position to allow compressor to engage. interior temperature sensors, and duct temperature sensors.
When to turn on the ECC in a Volvo 850?
The ECC control module normally supplies voltage to A/C relay, except when heater (blower motor) fan is off and vehicle speed is less than 20 MPH, when heater fan is off and recirculation is on, or momentarily when under full acceleration.
Do you need to replace coolant hoses on a Volvo 850?
After more than 20 years of services I decided to replace all of the original coolant hoses in my Volvo 850. This tutorial focuses on the rubber heater core hoses. This hoses on my car haven’t failed yet, but when pressed they felt very weak. – New lower / outlet (Volvo P/N 9186847) and upper / inlet (Volvo P/N 9186849) heater core hoses.
How do you replace heater hoses on a Volvo?
If you are replacing your heater hoses with regular OEM ones, just ignore that step. Step 1. Start by draining the coolant. I’ve done this by removing the lower radiator hose on the radiator. To gain access to it you’ll need to raise the front of the car and remove the splashguard under the radiator.
Where are the heater hoses in a Volvo?
Step 1. Apply hose clamps to the heater unit hoses in engine compartment to prevent engine coolant from going into the car. The heater hoses are below the brake servo. Step 2. Remove left and right soundproofing panels under the dashboard.
How do you remove a heater from a Volvo?
Detach the pipes from the heater unit. Then detach the heater unit and cover by pulling to the rear toward the gear selector lever and twisting them slightly up at the same time. When the heater unit is free of the upper part of the climate control system it can be removed to the side. Step 9.
Where is the heater core located in a car?
Replacing the heater core on these cars is easier than in most other cars. It is located in the dash, behind the radio, but it’s easily accessible. It took me around 2 hours to do it. – New heater core.
How to replace radiator hoses in a Volvo 850?
If you’re after how to replace the engine radiator hoses, check here: Volvo 850, S70, V70, C70 – How to replace upper and lower radiator hoses After more than 20 years of services I decided to replace all of the original coolant hoses in my Volvo 850. This tutorial focuses on the rubber heater core hoses.
How do you change the air filter on a Volvo 850?
Once you have removed the air filter box, remove the air pipe that connects the air filter box to the turbo. In order to do it, disconnect the big hose that connects to the PTC valve (A in the pictures below), the small hose and the plug to the PTC valve (marked B and C in the pictures) and then the clamp that holds the pipe to the turbo.
Where can I find the Volvo 850 service manual?
Below you can find the complete service and repair manual for the Volvo 850. All subjects (actually it are the chapters of the 850 service manual) are seperated in a single webpage. Click on the item you want to view and it will open in a new tab/window. Seats (powered and heated) troubleshooting, diagnostics, wiring diagram & repair instructions