Dorman - HD Solutions HVAC Heater Control Knob P/N:702-5402
Dorman 604-5402 heater control valve for the 1997-2011 Peterbilt 320 controls hot coolant flow through the heater core to create and regulate cabin heat.
Heat that stays weak or cold, a cabin temperature that will not adjust, or coolant leaking near the valve can mean the valve is failing. Before you replace it, rule out a clogged heater core or a blend door fault, since either can also leave the cab short on heat. If the HVAC heater control valve is the cause, this one takes its place.
It is a direct replacement for the 1997-2011 Peterbilt 320. The 1997-2011 Peterbilt 320 takes one.
Fit and size
Build and materials
One heater control valve.
Interchange: 557.75622 · 577.75622
MA16000
This part cross-references / interchanges with the following part numbers:
Will the Dorman 604-5402 heater control valve fit a 1997-2011 Peterbilt 320?
Yes. Dorman 604-5402 is listed for the 1997-2011 Peterbilt 320 as a direct replacement for an original valve that has malfunctioned or failed.
Is this heater control valve electric or vacuum operated?
It is electric. Dorman 604-5402 has electric valve operation, a plastic housing and two output ports.
Does the Dorman 604-5402 come with hoses or clamps?
No. The package holds one heater control valve only.
Does Dorman 604-5402 cross-reference to MA16000?
Yes. MA16000 is one of the other-brand numbers this part replaces; the full list is on the Interchange line.
Where is this heater control valve made?
The country of origin is the Republic of Korea.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.